Players — M
- Duke Maas 1955–1961
- Kevin Maas 1990–1995
- Bob Mabe 1958–1960
- Chris Mabeus 2006–2006
- John Mabry 1994–2007
- Mac MacArthur 1884–1884
- Frank MacCormack 1976–1977
- Harvey MacDonald 1928–1928
- Malcolm MacDonald 1902–1902
- Mike MacDougal 2001–2012
- Danny MacFayden 1926–1943
- Ed MacGamwell 1905–1905
- Willie MacIver 2025–2025
- Eric MacKenzie 1955–1955
- Gordon MacKenzie 1961–1961
- Ken MacKenzie 1960–1965
- David MacKinnon 2022–2022
- Evan MacLane 2010–2010
- Billy MacLeod 1962–1962
- Waddy MacPhee 1922–1922
- Harry MacPherson 1944–1944
- Scott MacRae 2001–2001
- Keith MacWhorter 1980–1980
- Bill Macdonald 1950–1953
- Bob Macdonald 1990–1996
- Harry Mace 1891–1891
- macey01 1890–1890
- Mike Macfarlane 1987–1999
- Ken Macha 1974–1981
- Mike Macha 1979–1980
- Alejandro Machado 2005–2005
- Anderson Machado 2003–2005
- Andres Machado 2017–2023
- Dixon Machado 2015–2022
- Julio Machado 1989–1991
- Manny Machado 2012–2025
- Robert Machado 1996–2004
- Chuck Machemehl 1971–1971
- Dave Machemer 1978–1979
- Jean Machi 2012–2017
- Vimael Machin 2020–2025
- Drew Macias 2007–2009
- Jose Macias 1999–2005
- Josh Maciejewski 2024–2024
- Bill Mack 1908–1908
- Connie Mack 1886–1896
- Denny Mack 1871–1883
- Earle Mack 1910–1914
- Frank Mack 1922–1925
- George Mack 1945–1945
- Joe Mack 1945–1945
- Quinn Mack 1994–1994
- Ray Mack 1938–1947
- Reddy Mack 1885–1890
- Shane Mack 1987–1998
- Tony Mack 1985–1985
- Pete Mackanin 1973–1981
- Biz Mackey 1920–1947
- Felix Mackiewicz 1941–1947
- John Mackinson 1953–1955
- Steve Macko 1979–1980
- Rob Mackowiak 2001–2008
- Lonnie Maclin 1993–1993
- Max Macon 1938–1947
- Matt Macri 2008–2008
- Jimmy Macullar 1879–1886
- Bunny Madden 1909–1911
- Frank Madden 1914–1914
- Gene Madden 1916–1916
- Kid Madden 1887–1891
- Len Madden 1912–1912
- Mike Madden 1983–1986
- Morris Madden 1987–1989
- Tommy Madden 1906–1910
- Ty Madden 2024–2024
- Clarence Maddern 1946–1951
- Austin Maddox 2017–2017
- Elliott Maddox 1970–1980
- Forest Maddox 1923–1923
- Garry Maddox 1972–1986
- Jerry Maddox 1978–1978
- Nick Maddox 1907–1910
- Greg Maddux 1986–2008
- Mike Maddux 1986–2000
- Luis Madero 2021–2021
- William Madigan 1886–1886
- Art Madison 1895–1899
- Bob Madison 1935–1938
- Dave Madison 1950–1953
- Scotti Madison 1985–1989
- Ed Madjeski 1932–1937
- Bill Madlock 1973–1987
- Alex Madrid 1987–1989
- Sal Madrid 1947–1947
- Nick Madrigal 2020–2024
- Warner Madrigal 2008–2009
- Bligh Madris 2022–2024
- Bobby Madritsch 2004–2005
- Ryan Madson 2003–2018
- Calvin Maduro 1996–2002
- Kenta Maeda 2016–2025
- Hector Maestri 1960–1961
- Dave Magadan 1986–2001
- Ever Magallanes 1991–1991
- Bill Magee 1897–1902
- Lee Magee 1911–1919
- Sherry Magee 1904–1919
- Wendell Magee 1996–2002
- Harl Maggert 1938–1938
- Harl Maggert 1907–1912
- Drew Maggi 2023–2023
- Matt Magill 2013–2020
- Sal Maglie 1945–1958
- Mike Magnante 1991–2002
- John Magner 1879–1879
- Stubby Magner 1911–1911
- Damien Magnifico 2016–2017
- Jim Magnuson 1970–1973
- Trystan Magnuson 2011–2011
- George Magoon 1898–1903
- Joe Magrane 1987–1996
- Tom Magrann 1989–1989
- Pete Magrini 1966–1966
- José Magriñat 1906–1916
- Chris Magruder 2001–2005
- Freddie Maguire 1922–1931
- Jack Maguire 1950–1951
- Thomas Maguire 1894–1894
- Jim Mahady 1921–1921
- Art Mahaffey 1960–1966
- Lou Mahaffey 1898–1898
- Roy Mahaffey 1926–1936
- Art Mahan 1940–1940
- Frank Mahar 1902–1902
- Kevin Mahar 2007–2007
- Billy Maharg 1912–1916
- Ron Mahay 1995–2010
- Tom Maher 1902–1902
- Greg Mahlberg 1978–1979
- Greg Mahle 2016–2016
- Tyler Mahle 2017–2025
- Mickey Mahler 1977–1986
- Rick Mahler 1979–1991
- Paul Maholm 2005–2014
- Pat Mahomes 1992–2003
- Al Mahon 1930–1930
- Anthony Mahoney 1921–1923
- Bob Mahoney 1951–1952
- Chris Mahoney 1910–1910
- Dan Mahoney 1892–1895
- Danny Mahoney 1911–1911
- Jim Mahoney 1959–1965
- Joe Mahoney 2012–2013
- Mike Mahoney 2000–2005
- Mike Mahoney 1897–1898
- Ule Mahoney 1944–1944
- Mikie Mahtook 2015–2019
- Bob Maier 1945–1945
- Mitch Maier 2006–2012
- Luke Maile 2015–2025
- Emil Mailho 1936–1936
- Duster Mails 1915–1926
- Alex Main 1914–1918
- Woody Main 1948–1953
- John Maine 2004–2013
- Scott Maine 2010–2012
- Jim Mains 1943–1943
- Willard Mains 1888–1896
- Oswaldo Mairena 2000–2002
- Charlie Maisel 1915–1915
- Fritz Maisel 1913–1918
- George Maisel 1913–1922
- Hank Majeski 1939–1955
- Gary Majewski 2004–2010
- Val Majewski 2004–2004
- William Makell 1943–1944
- Kazuhisa Makita 2018–2018
- Frank Makosky 1937–1937
- Tom Makowski 1975–1975
- Mike Maksudian 1992–1994
- Dave Malarcher 1916–1934
- Bill Malarkey 1908–1908
- John Malarkey 1894–1903
- Mark Malaska 2003–2004
- Jose Malave 1996–1997
- Charlie Malay 1905–1905
- Joe Malay 1933–1935
- malco01 1939–1939
- Anthony Maldonado 2024–2025
- Candy Maldonado 1981–1995
- Carlos Maldonado 2006–2012
- Carlos Maldonado 1990–1993
- Martin Maldonado 2011–2025
- Jim Maler 1981–1983
- Arthur Malette 1913–1916
- Tony Malinosky 1937–1937
- Cy Malis 1934–1934
- Bobby Malkmus 1957–1962
- Jerry Mallett 1959–1959
- Brian Mallette 2002–2002
- Mal Mallette 1950–1950
- Rob Mallicoat 1987–1992
- Les Mallon 1931–1935
- Ben Mallonee 1921–1921
- Jule Mallonee 1925–1925
- Jim Mallory 1940–1945
- Sheldon Mallory 1977–1977
- Alex Malloy 1910–1910
- Bob Malloy 1943–1949
- Bob Malloy 1987–1990
- Herm Malloy 1907–1908
- Justyn-Henry Malloy 2024–2025
- Marty Malloy 1998–2002
- Harry Malmberg 1955–1955
- Chuck Malone 1990–1990
- Eddie Malone 1949–1950
- Fergy Malone 1871–1884
- Lew Malone 1915–1919
- Pat Malone 1928–1937
- Thomas Malone 1872–1872
- William Malone 1891–1891
- malon01 1944–1944
- Billy Maloney 1901–1908
- Charlie Maloney 1908–1908
- Jim Maloney 1960–1971
- Matt Maloney 2009–2012
- Pat Maloney 1912–1912
- Robert Maloney 1876–1877
- Sean Maloney 1997–1998
- Paul Maloy 1913–1913
- Gordon Maltzberger 1943–1947
- Frank Malzone 1955–1966
- Al Mamaux 1913–1924
- Sean Manaea 2016–2025
- Trey Mancini 2016–2023
- Frank Mancuso 1944–1947
- Gus Mancuso 1928–1945
- Carl Manda 1914–1914
- Hal Manders 1941–1946
- Claudio Manela 1921–1921
- Seth Maness 2013–2017
- Vincent Maney 1912–1912
- Jim Mangan 1952–1956
- Matt Mangini 2010–2010
- mangr01 1948–1948
- Angel Mangual 1969–1976
- Pepe Mangual 1972–1977
- Jake Mangum 2025–2025
- Leo Mangum 1924–1935
- George Mangus 1912–1912
- Clyde Manion 1920–1934
- Phil Mankowski 1976–1982
- Charlie Manlove 1884–1884
- Brandon Mann 2018–2018
- Fred Mann 1882–1887
- Garth Mann 1944–1944
- Jim Mann 2000–2003
- Johnny Mann 1928–1928
- Kelly Mann 1989–1990
- Les Mann 1913–1928
- Charlie Manning 2008–2008
- David Manning 2003–2003
- Ernie Manning 1914–1914
- Felix Manning 1932–1944
- Jack Manning 1873–1886
- Jim Manning 1962–1962
- Jim Manning 1884–1889
- John Manning 1903–1903
- Matt Manning 2021–2024
- Max Manning 1939–1948
- Rick Manning 1975–1987
- Rube Manning 1907–1910
- Tim Manning 1882–1885
- Don Manno 1940–1941
- Alek Manoah 2021–2024
- Julio Manon 2003–2006
- Ramon Manon 1990–1990
- Fred Manrique 1981–1991
- John Mansell 1882–1882
- Mike Mansell 1879–1884
- Tom Mansell 1879–1884
- Jeff Manship 2009–2016
- Lou Manske 1906–1906
- Matt Mantei 1995–2005
- mante01 1912–1912
- Felix Mantilla 1956–1966
- Joe Mantiply 2016–2025
- Mickey Mantle 1951–1968
- Jeff Manto 1990–2000
- Barry Manuel 1991–1998
- Charlie Manuel 1969–1975
- Jerry Manuel 1975–1982
- Moxie Manuel 1905–1908
- Robert Manuel 2009–2010
- Frank Manush 1908–1908
- Heinie Manush 1923–1939
- Dick Manville 1950–1952
- Kirt Manwaring 1987–1999
- Josias Manzanillo 1991–2004
- Ravelo Manzanillo 1988–1995
- Hilario Manzano 1918–1918
- Kyle Manzardo 2024–2025
- Tommy Manzella 2009–2010
- Rolla Mapel 1919–1919
- Cliff Mapes 1948–1952
- Howard Maple 1932–1932
- Dillon Maples 2017–2021
- George Mappes 1885–1886
- Paul Marak 1990–1990
- Georges Maranda 1960–1962
- Rabbit Maranville 1912–1935
- Firpo Marberry 1923–1936
- Walt Marbet 1913–1913
- Tucupita Marcano 2021–2023
- Oliver Marcell 1918–1929
- Ziggy Marcell 1939–1948
- Rafael Marchan 2020–2025
- Phil Marchildon 1940–1950
- Johnny Marcum 1933–1939
- Shaun Marcum 2005–2015
- Leo Marentette 1965–1969
- Nick Margevicius 2019–2021
- Joe Margoneri 1956–1957
- Manuel Margot 2016–2025
- Juan Marichal 1960–1975
- Sugar Ray Marimon 2015–2015
- Ron Marinaccio 2022–2025
- Jhan Marinez 2010–2018
- Dan Marion 1914–1915
- Marty Marion 1940–1953
- Red Marion 1935–1943
- Michael Mariot 2014–2023
- Roger Maris 1957–1968
- Jake Marisnick 2013–2023
- Mike Marjama 2017–2018
- Nick Markakis 2006–2020
- Parker Markel 2019–2022
- Duke Markell 1951–1951
- Duke Markham 1935–1936
- Johnny Markham 1930–1945
- Gene Markland 1950–1950
- Cliff Markle 1915–1924
- Justin Marks 2014–2017
- Matt Marksberry 2015–2016
- J. F. Marlota 1911–1911
- Cade Marlowe 2023–2024
- Dick Marlowe 1951–1956
- Carlos Marmol 2006–2014
- Jose Marmolejos 2020–2021
- Hal Marnie 1940–1942
- Fred Marolewski 1953–1953
- Nick Maronde 2012–2014
- Lou Marone 1969–1970
- Mike Maroth 2002–2007
- Rube Marquard 1908–1925
- Ollie Marquardt 1931–1931
- Brailyn Marquez 2020–2020
- German Marquez 2016–2025
- Gonzalo Marquez 1972–1974
- Isidro Marquez 1995–1995
- Jeff Marquez 2010–2011
- Bob Marquis 1953–1953
- Jason Marquis 2000–2015
- Jim Marquis 1925–1925
- Roger Marquis 1955–1955
- Lefty Marr 1886–1891
- Chris Marrero 2011–2017
- Connie Marrero 1950–1954
- Deven Marrero 2015–2022
- Eli Marrero 1997–2006
- Oreste Marrero 1993–1996
- William Marriott 1917–1927
- Buck Marrow 1932–1938
- Ed Mars 1890–1890
- Armando Marsans 1905–1918
- Jakob Marsee 2025–2025
- Alec Marsh 2023–2024
- Brandon Marsh 2021–2025
- Fred Marsh 1949–1956
- Tom Marsh 1992–1995
- marsh02 1932–1932
- Bill Marshall 1931–1934
- Bobby Marshall 1909–1910
- Brett Marshall 2013–2013
- Chip Marshall 1941–1941
- Cuddles Marshall 1946–1950
- Dave Marshall 1967–1973
- Doc Marshall 1904–1909
- Doc Marshall 1929–1932
- Evan Marshall 2014–2021
- Jack Marshall 1920–1929
- Jack Marshall 1926–1944
- Jay Marshall 2007–2009
- Jim Marshall 1958–1962
- Joe Marshall 1903–1906
- Keith Marshall 1973–1973
- Max Marshall 1942–1944
- Mike Marshall 1981–1991
- Mike Marshall 1967–1981
- Rube Marshall 1912–1915
- Sean Marshall 2006–2014
- Willard Marshall 1942–1955
- marsh01 1929–1929
- Lou Marson 2008–2013
- Sam Marsonek 2004–2004
- Alfredo Marte 2013–2015
- Andy Marte 2005–2014
- Damaso Marte 1999–2010
- Jefry Marte 2015–2018
- Jose Marte 2021–2024
- Kelvin Marte 2016–2016
- Ketel Marte 2015–2025
- Luis Marte 2021–2021
- Luis Marte 2011–2012
- Noelvi Marte 2023–2025
- Starling Marte 2012–2025
- Victor Marte 2009–2013
- Yunior Marte 2022–2024
- Doc Martell 1909–1910
- Francis Martes 2017–2017
- Al Martin 1992–2003
- Al Martin 1872–1875
- Austin Martin 2024–2025
- Babe Martin 1944–1953
- Barney Martin 1953–1953
- Billy Martin 1950–1961
- Billy Martin 1914–1914
- Brett Martin 2019–2022
- Chris Martin 2014–2025
- Clem Martin 1939–1939
- Cody Martin 2015–2017
- Corbin Martin 2019–2025
- Davis Martin 2022–2025
- Doc Martin 1908–1912
- Ethan Martin 2013–2014
- Felix Martin 1926–1926
- Frank Martin 1897–1899
- Fred Martin 1946–1950
- Gene Martin 1968–1968
- Harvey Martin 1908–1908
- Hersh Martin 1937–1945
- J. C. Martin 1959–1972
- J. D. Martin 2009–2010
- Jack Martin 1912–1914
- Jason Martin 2019–2021
- Jerry Martin 1974–1984
- Joe Martin 1936–1938
- Joe Martin 1903–1903
- John Martin 1980–1983
- Kyle Martin 2017–2017
- Leonys Martin 2011–2019
- Mike Martin 1986–1986
- Morrie Martin 1949–1959
- Norberto Martin 1993–1999
- Pat Martin 1919–1920
- Paul Martin 1955–1955
- Pepper Martin 1928–1944
- Phonney Martin 1872–1873
- Rafael Martin 2015–2016
- Ray Martin 1943–1948
- Renie Martin 1979–1984
- Richie Martin 2019–2022
- Russell Martin 2006–2019
- Speed Martin 1917–1922
- Stack Martin 1925–1928
- Stu Martin 1936–1943
- Tom Martin 1997–2007
- marti01 1939–1939
- Joe Martina 1924–1924
- Adrian Martinez 2022–2023
- Anastacio Martinez 2004–2004
- Buck Martinez 1969–1986
- Carlos Martinez 2013–2021
- Carlos Martinez 2006–2009
- Carlos Martinez 1988–1995
- Carmelo Martinez 1983–1991
- Chito Martinez 1991–1993
- Cristhian Martinez 2009–2013
- Dave Martinez 1986–2001
- David Martinez 2013–2014
- Dennis Martinez 1976–1998
- Domingo Martinez 1992–1993
- Edgar Martinez 1987–2004
- Felix Martinez 1997–2001
- Fernando Martinez 2009–2013
- Freddie Martinez 1980–1981
- Greg Martinez 1998–1998
- Hector Martinez 1962–1963
- J. D. Martinez 2011–2024
- Javier Martinez 1998–1998
- Joe Martinez 2009–2013
- Jose Martinez 1994–1994
- Jose Martinez 2016–2020
- Jose Martinez 1969–1970
- Justin Martinez 2023–2025
- Luis Martinez 2003–2003
- Luis Martinez 2011–2012
- Manny Martinez 1996–1999
- Marty Martinez 1962–1972
- Michael Martinez 2011–2017
- Nick Martinez 2014–2025
- Orelvis Martinez 2024–2024
- Osvaldo Martinez 2010–2011
- Pablo Martinez 1996–1996
- Pedro Martinez 1992–2009
- Pedro Martinez 1993–1997
- Ramon Martinez 1988–2001
- Ramon Martinez 1998–2009
- Rogelio Martinez 1950–1950
- Sandy Martinez 1995–2004
- Seth Martinez 2021–2025
- Silvio Martinez 1977–1981
- Ted Martinez 1970–1979
- Tino Martinez 1990–2005
- Tippy Martinez 1974–1988
- Tony Martinez 1963–1966
- Victor Martinez 2002–2018
- Willie Martinez 2000–2000
- Nick Martini 2018–2025
- Wedo Martini 1935–1935
- Shairon Martis 2008–2013
- Joe Marty 1937–1941
- Bob Martyn 1957–1959
- Gary Martz 1975–1975
- Randy Martz 1980–1983
- Angel Martínez 2024–2025
- J. P. Martínez 2023–2024
- Lino Martínez 1906–1906
- Pablo Martínez 1928–1928
- Pasqual Martínez 1924–1924
- Prudencio Martínez 1918–1922
- Rabbit Martínez 1935–1947
- Ramón Martínez 1928–1928
- James Marvel 2019–2019
- John Marzano 1987–1998
- Onan Masaoka 1999–2000
- Forrest Mashaw 1920–1920
- Clyde Mashore 1969–1973
- Damon Mashore 1996–1998
- Phil Masi 1939–1952
- Manuel Masiñeira 1906–1906
- Harry Maskrey 1882–1882
- Leech Maskrey 1882–1886
- Charlie Mason 1875–1883
- Charlie Mason 1922–1932
- Del Mason 1904–1907
- Don Mason 1966–1973
- Ernie Mason 1894–1894
- Hank Mason 1958–1960
- Jim Mason 1971–1979
- Mike Mason 1982–1988
- Roger Mason 1984–1994
- mason01 1918–1918
- mason02 1909–1909
- Gordon Massa 1957–1958
- Nick Masset 2006–2015
- Bill Massey 1894–1894
- Michael Massey 2022–2025
- Mike Massey 1917–1917
- Red Massey 1918–1918
- Garcia Massingale 1944–1945
- Salvador Massip 1925–1925
- Dan Masteller 1995–1995
- Walt Masters 1931–1939
- Justin Masterson 2008–2015
- Paul Masterson 1940–1942
- Walt Masterson 1939–1956
- Tom Mastny 2006–2008
- Miles Mastrobuoni 2022–2025
- Darin Mastroianni 2011–2016
- Frank Mata 2010–2010
- Victor Mata 1984–1985
- Len Matarazzo 1952–1952
- Jack Matchett 1940–1945
- Tommy Matchick 1967–1972
- Henry Mateo 2001–2006
- Jorge Mateo 2020–2025
- Juan Mateo 2006–2006
- Julio Mateo 2002–2007
- Marcos Mateo 2010–2015
- Ruben Mateo 1999–2004
- Mike Matheny 1994–2006
- Joe Mather 2008–2012
- Joe Mathes 1912–1916
- Bobby Mathews 1871–1887
- Dell Mathews 1906–1906
- Eddie Mathews 1952–1968
- Greg Mathews 1986–1992
- Nelson Mathews 1960–1965
- T. J. Mathews 1995–2002
- Terry Mathews 1991–1999
- Christy Mathewson 1900–1916
- Henry Mathewson 1906–1907
- Carl Mathias 1960–1961
- Mark Mathias 2020–2023
- Scott Mathieson 2006–2011
- Doug Mathis 2008–2010
- Jeff Mathis 2005–2021
- Ron Mathis 1985–1987
- Verdell Mathis 1940–1948
- Wyatt Mathisen 2020–2021
- Jimmy Mathison 1902–1902
- John Matias 1970–1970
- J. J. Matijevic 2022–2022
- Jon Matlack 1971–1983
- Leroy Matlock 1929–1938
- Nick Maton 2021–2025
- Phil Maton 2017–2025
- Francisco Matos 1994–1994
- Julius Matos 2002–2003
- Luis Matos 2000–2006
- Luis Matos 2023–2025
- Osiris Matos 2008–2009
- Pascual Matos 1999–1999
- Dave Matranga 2003–2005
- Hideki Matsui 2003–2012
- Kazuo Matsui 2004–2010
- Yuki Matsui 2024–2025
- Daisuke Matsuzaka 2007–2014
- Al Mattern 1908–1912
- Troy Mattes 2001–2001
- C. V. Matteson 1884–1884
- Eddie Matteson 1914–1918
- Ryan Mattheus 2011–2015
- Brice Matthews 2025–2025
- Charles Matthews 1891–1891
- Dick Matthews 1932–1932
- Fran Matthews 1938–1945
- Gary Matthews 1972–1987
- Gary Matthews 1999–2010
- Jack Matthews 1923–1923
- Jesse Matthews 1942–1942
- Joe Matthews 1922–1922
- Mike Matthews 2000–2005
- Wid Matthews 1923–1925
- William Matthews 1909–1909
- Zebby Matthews 2024–2025
- Dale Matthewson 1943–1944
- Steve Matthias 1884–1884
- Bobby Mattick 1938–1942
- Wally Mattick 1912–1918
- Mike Mattimore 1887–1890
- Don Mattingly 1982–1995
- Earl Mattingly 1931–1931
- Ralph Mattis 1914–1914
- Kevin Mattison 2012–2012
- Cloy Mattox 1929–1929
- Jim Mattox 1922–1923
- Isaac Mattson 2021–2025
- Rick Matula 1979–1981
- Brian Matusz 2009–2016
- Len Matuszek 1981–1987
- Harry Matuzak 1934–1936
- Steven Matz 2015–2025
- Tyler Matzek 2014–2025
- Gene Mauch 1944–1957
- Hal Mauck 1893–1893
- Fred Mauer 1886–1886
- Joe Mauer 2004–2018
- Al Maul 1884–1901
- Mark Mauldin 1934–1934
- Ernie Maun 1924–1926
- Dick Mauney 1945–1947
- Harry Maupin 1898–1899
- Brandon Maurer 2013–2018
- Dave Maurer 2000–2004
- Rob Maurer 1991–1992
- Ronny Mauricio 2023–2025
- Ralph Mauriello 1958–1958
- Carmen Mauro 1948–1953
- Tim Mauser 1991–1995
- Bob Mavis 1949–1949
- Brian Maxcy 1995–1996
- Larry Maxie 1969–1969
- Dal Maxvill 1962–1975
- Bert Maxwell 1906–1914
- Bruce Maxwell 2016–2018
- Charlie Maxwell 1950–1964
- Jason Maxwell 1998–2001
- Justin Maxwell 2007–2015
- Zach Maxwell 2025–2025
- Zearlee Maxwell 1937–1938
- maxwe01 1914–1914
- Buckshot May 1924–1924
- Carlos May 1968–1977
- Darrell May 1995–2005
- Dave May 1967–1978
- Derrick May 1990–1999
- Dustin May 2019–2025
- Jacob May 2017–2017
- Jakie May 1917–1932
- Jerry May 1964–1973
- Joe May 1937–1937
- Lee May 1965–1982
- Lucas May 2010–2010
- Merrill May 1939–1943
- Milt May 1970–1984
- Rudy May 1965–1983
- Scott May 1988–1991
- Trevor May 2014–2023
- Yunesky Maya 2010–2013
- John Mayberry 1968–1982
- John Mayberry 2009–2015
- Cameron Maybin 2007–2021
- Lee Maye 1959–1971
- Ed Mayer 1890–1891
- Ed Mayer 1957–1958
- Erskine Mayer 1912–1919
- Marcelo Mayer 2025–2025
- Sam Mayer 1915–1915
- Wally Mayer 1911–1919
- Mike Mayers 2016–2023
- Paddy Mayes 1911–1911
- Jack Mayfield 2019–2022
- Buster Maynard 1940–1946
- Chick Maynard 1922–1922
- Brent Mayne 1990–2004
- Coby Mayo 2024–2025
- Eddie Mayo 1936–1948
- Jackie Mayo 1948–1953
- Jimmy Mayo 1906–1908
- Al Mays 1885–1890
- Carl Mays 1915–1929
- Dave Mays 1937–1937
- Joe Mays 1999–2006
- Willie Mays 1948–1973
- mays01 1938–1938
- Matt Maysey 1992–1993
- Edwin Maysonet 2008–2012
- Ed Mayweather 1935–1942
- Tim Mayza 2017–2025
- Luis Maza 2008–2008
- Nomar Mazara 2016–2022
- Patrick Mazeika 2021–2022
- Bill Mazeroski 1956–1972
- Adam Mazur 2024–2025
- Chris Mazza 2019–2022
- Vin Mazzaro 2009–2016
- Mel Mazzera 1935–1940
- Lee Mazzilli 1976–1989
- Cory Mazzoni 2015–2018
- Jack McAdams 1911–1911
- Tullie McAdoo 1909–1924
- Bill McAfee 1930–1934
- Jimmy McAleer 1889–1907
- Jack McAleese 1901–1909
- Bill McAllester 1913–1913
- Frank McAllister 1937–1943
- George McAllister 1923–1934
- Sport McAllister 1896–1903
- Zach McAllister 2011–2023
- Ernie McAnally 1971–1974
- Jim McAnany 1958–1962
- Jamie McAndrew 1995–1997
- Jim McAndrew 1968–1974
- Paul McAnulty 2005–2010
- Dixie McArthur 1914–1914
- James McArthur 2023–2024
- Michael McAtee 1871–1872
- Ulysses McAtee 1931–1931
- Ike McAuley 1914–1925
- Dick McAuliffe 1960–1975
- Gene McAuliffe 1904–1904
- George McAvoy 1914–1914
- Tom McAvoy 1959–1959
- Wickey McAvoy 1913–1919
- Al McBean 1961–1970
- Pryor McBee 1926–1926
- Marcus McBeth 2007–2007
- Algie McBride 1896–1901
- Bake McBride 1973–1983
- Dick McBride 1871–1876
- Fred McBride 1931–1940
- George McBride 1901–1920
- Ken McBride 1959–1965
- Macay McBride 2005–2007
- Matt McBride 2012–2016
- Pete McBride 1898–1899
- Tom McBride 1943–1948
- Tuts McBride 1941–1941
- mcbrijo01 1890–1890
- Ryan McBroom 2019–2021
- mccab01 1923–1923
- Bill McCabe 1918–1920
- Dick McCabe 1918–1922
- Joe McCabe 1964–1965
- Ralph McCabe 1946–1946
- Swat McCabe 1909–1910
- Tim McCabe 1915–1918
- Harry McCaffery 1882–1883
- Bill McCaffrey 1885–1885
- Sparrow McCaffrey 1889–1889
- Bill McCahan 1946–1949
- Bill McCall 1922–1931
- Brian McCall 1962–1963
- Dutch McCall 1948–1948
- Henry McCall 1936–1945
- Larry McCall 1977–1979
- Windy McCall 1948–1957
- Randy McCament 1989–1990
- Jack McCandless 1914–1915
- Brian McCann 2005–2019
- Emmet McCann 1920–1926
- Gene McCann 1901–1902
- James McCann 2014–2025
- Kyle McCann 2024–2024
- Roger McCardell 1959–1959
- Bill McCarren 1923–1923
- Alex McCarthy 1910–1917
- Arch McCarthy 1902–1902
- Bill McCarthy 1905–1907
- Brandon McCarthy 2005–2018
- Greg McCarthy 1996–1998
- Jack McCarthy 1893–1907
- Jake McCarthy 2021–2025
- Jerry McCarthy 1948–1948
- Joe McCarthy 2020–2020
- Joe McCarthy 1905–1906
- Johnny McCarthy 1934–1948
- Kevin McCarthy 2016–2020
- Tom McCarthy 1908–1909
- Tom McCarthy 1985–1989
- Tommy McCarthy 1884–1896
- William McCarthy 1906–1906
- Frank McCarton 1872–1872
- Dave McCarty 1993–2005
- John McCarty 1889–1889
- Kirk McCarty 2022–2022
- Lew McCarty 1913–1921
- Tim McCarver 1959–1980
- Kirk McCaskill 1985–1996
- Steve McCatty 1977–1985
- Darren McCaughan 2021–2025
- Al McCauley 1884–1891
- Bailey McCauley 1930–1930
- Bill McCauley 1895–1895
- Jim McCauley 1884–1886
- Pat McCauley 1893–1903
- Harry McChesney 1904–1904
- Bill McClain 1933–1933
- Boots McClain 1920–1926
- Jeep McClain 1945–1946
- Joe McClain 1961–1962
- Reggie McClain 2019–2020
- Scott McClain 1998–2008
- Pete McClanahan 1931–1931
- Shane McClanahan 2021–2023
- Bill McClellan 1878–1888
- Danny McClellan 1903–1911
- Hervey McClellan 1919–1924
- Kyle McClellan 2008–2013
- Paul McClellan 1990–1991
- Zach McClellan 2007–2007
- Lloyd McClendon 1987–1994
- Mike McClendon 2010–2012
- Jeff McCleskey 1913–1913
- Nat McClinic 1948–1948
- Bill McCloskey 1875–1884
- Jim McCloskey 1936–1936
- John McCloskey 1906–1907
- Seth McClung 2003–2009
- Bob McClure 1920–1929
- Bob McClure 1975–1993
- Hal McClure 1882–1882
- Larry McClure 1910–1910
- Harry McCluskey 1915–1915
- Alex McColl 1933–1934
- Ralph McConnaughey 1914–1914
- Amby McConnell 1908–1911
- George McConnell 1909–1916
- Sam McConnell 1915–1915
- Sam McConnell 2004–2004
- Billy McCool 1964–1970
- Butch McCord 1948–1948
- Don McCormack 1980–1981
- Mike McCormack 1904–1904
- Barry McCormick 1895–1904
- Chas McCormick 2021–2025
- Frank McCormick 1934–1948
- Harry McCormick 1904–1913
- Harry McCormick 1879–1883
- Jerry McCormick 1883–1884
- Jim McCormick 1878–1887
- Jim McCormick 1892–1892
- Mike McCormick 1956–1971
- Mike McCormick 1940–1951
- Bill McCorry 1909–1909
- Barney McCosky 1939–1953
- Willie McCovey 1959–1980
- Art McCoy 1889–1889
- Benny McCoy 1938–1941
- Frank McCoy 1929–1943
- Mason McCoy 2023–2025
- Mike McCoy 2009–2012
- Pat McCoy 2014–2014
- Walter McCoy 1945–1947
- Les McCrabb 1939–1950
- Quinton McCracken 1995–2006
- John McCrary 1943–1943
- Willie McCrary 1944–1944
- Tommy McCraw 1963–1975
- Grant McCray 2024–2025
- Rodney McCray 1990–1992
- Frank McCrea 1925–1925
- mccre01 1937–1937
- Judge McCredie 1903–1903
- Adam McCreery 2018–2018
- Ed McCreery 1914–1914
- Tom McCreery 1895–1903
- Bob McCrory 2008–2009
- Frank McCue 1922–1922
- Lance McCullers 1985–1992
- Lance McCullers 2015–2025
- Charlie McCullough 1890–1890
- Clyde McCullough 1940–1956
- Paul McCullough 1929–1929
- Phil McCullough 1942–1942
- Harry McCurdy 1922–1934
- Jim McCurine 1946–1948
- Jeff McCurry 1995–1999
- Carson McCusker 2025–2025
- Andrew McCutchen 2009–2025
- Daniel McCutchen 2009–2014
- Booker McDaniel 1941–1945
- Fred McDaniel 1940–1946
- Lindy McDaniel 1955–1975
- Terry McDaniel 1991–1991
- Von McDaniel 1957–1958
- Garrett McDaniels 2025–2025
- Ray McDavid 1994–1995
- Chayce McDermott 2024–2025
- James McDermott 1871–1872
- Michael McDermott 1889–1889
- Mickey McDermott 1948–1961
- Mike McDermott 1895–1897
- Red McDermott 1912–1912
- Sandy McDermott 1885–1885
- Terry McDermott 1972–1972
- Danny McDevitt 1957–1962
- Allen McDill 1997–2001
- Ben McDonald 1989–1997
- Darnell McDonald 2004–2013
- Dave McDonald 1969–1971
- Donzell McDonald 2001–2002
- Ed McDonald 1911–1913
- Gifford McDonald 1910–1921
- Hank McDonald 1931–1933
- Jack McDonald 1872–1872
- James McDonald 2008–2013
- Jason McDonald 1997–2000
- Jim McDonald 1884–1885
- Jim McDonald 1950–1958
- Joe McDonald 1910–1910
- John McDonald 1999–2014
- John McDonald 1907–1907
- Keith McDonald 2000–2001
- Luther McDonald 1927–1935
- Mickey McDonald 2022–2022
- Tex McDonald 1912–1915
- Trevor McDonald 2024–2025
- Webster McDonald 1925–1940
- mcdon01 1942–1942
- Jim McDonnell 1943–1945
- Ed McDonough 1909–1910
- mcdoo01 1873–1873
- Dewey McDougal 1895–1896
- Lem McDougal 1917–1920
- Sandy McDougal 1895–1905
- Gil McDougald 1951–1960
- Marshall McDougall 2005–2005
- Rabbit McDougall 1909–1909
- Jack McDowell 1987–1999
- Oddibe McDowell 1985–1994
- Roger McDowell 1985–1996
- Sam McDowell 1961–1975
- Terris McDuffie 1930–1945
- Chuck McElroy 1989–2001
- Jim McElroy 1884–1884
- Pryor McElveen 1909–1911
- Lee McElwee 1916–1916
- Frank McElyea 1942–1942
- Will McEnaney 1974–1979
- Lou McEvoy 1930–1931
- Joe McEwing 1998–2006
- Barney McFadden 1901–1902
- Guy McFadden 1895–1895
- Leon McFadden 1968–1970
- Alex McFarlan 1892–1892
- Dan McFarlan 1895–1899
- Chappie McFarland 1902–1906
- Chris McFarland 1884–1884
- Ed McFarland 1893–1908
- Herm McFarland 1896–1903
- Howie McFarland 1945–1945
- John McFarland 1944–1947
- Monte McFarland 1895–1896
- T. J. McFarland 2013–2025
- Orlando McFarlane 1962–1968
- John McFarlin 1932–1932
- Jack McFetridge 1890–1903
- Andy McGaffigan 1981–1991
- Patsy McGaffigan 1917–1918
- Eddie McGah 1946–1947
- Ambrose McGann 1895–1895
- Dan McGann 1896–1908
- Chippy McGarr 1884–1896
- Jim McGarr 1912–1912
- Dan McGarvey 1912–1912
- Jack McGeachey 1886–1891
- Mike McGeary 1871–1882
- Bill McGee 1935–1942
- Dan McGee 1934–1934
- Easton McGee 2022–2025
- Frank McGee 1925–1925
- Jake McGee 2010–2022
- Pat McGee 1874–1875
- Willie McGee 1982–1999
- Connie McGeehan 1903–1903
- Dan McGeehan 1911–1911
- Casey McGehee 2008–2016
- Kevin McGehee 1993–1993
- Pat McGehee 1912–1912
- Bill McGhee 1944–1945
- Ed McGhee 1950–1955
- Randy McGilberry 1977–1978
- Bill McGill 1907–1907
- Willie McGill 1890–1896
- John McGillen 1944–1944
- Bill McGilvray 1908–1908
- Jim McGinley 1904–1905
- Tim McGinley 1875–1876
- Dan McGinn 1968–1972
- Frank McGinn 1890–1890
- Gus McGinnis 1893–1893
- Jumbo McGinnis 1882–1887
- Russ McGinnis 1992–1995
- Joe McGinnity 1899–1908
- Kevin McGlinchy 1999–2000
- John McGlone 1886–1888
- Lynn McGlothen 1972–1982
- Pat McGlothin 1949–1950
- Jim McGlothlin 1965–1973
- Stoney McGlynn 1906–1908
- Scott McGough 2015–2025
- Art McGovern 1905–1905
- Tom McGovern 1874–1874
- Dustin McGowan 2005–2017
- Frank McGowan 1922–1937
- Kevin McGowan 2017–2017
- Mickey McGowan 1948–1948
- Kyle McGowin 2018–2021
- Howard McGraner 1912–1912
- Kyle McGrath 2017–2018
- Bob McGraw 1917–1929
- John McGraw 1914–1914
- John McGraw 1891–1907
- Tom McGraw 1997–1997
- Tug McGraw 1965–1984
- Michael McGreevy 2024–2025
- Scott McGregor 1976–1988
- Slim McGrew 1922–1924
- Fred McGriff 1986–2004
- Terry McGriff 1987–1994
- Mark McGrillis 1892–1892
- Joe McGuckin 1890–1890
- Chris McGuiness 2013–2013
- John McGuinness 1876–1884
- Bill McGuire 1988–1989
- Deacon McGuire 1884–1912
- Deck McGuire 2017–2018
- Jim McGuire 1901–1901
- Mickey McGuire 1962–1967
- Reese McGuire 2018–2025
- Ryan McGuire 1997–2002
- Tom McGuire 1914–1919
- Bill McGunnigle 1879–1882
- Mark McGwire 1986–2001
- Bob McHale 1898–1898
- Jim McHale 1908–1908
- John McHale 1943–1948
- Marty McHale 1910–1916
- J. C. McHaskell 1927–1929
- Austin McHenry 1918–1922
- Henry McHenry 1930–1948
- Vance McHenry 1981–1982
- Collin McHugh 2012–2023
- Vance McIlree 1921–1921
- Irish McIlveen 1906–1909
- Stover McIlwain 1957–1958
- Stuffy McInnis 1909–1927
- Harry McIntire 1905–1913
- Jimmy McIntosh 1937–1937
- Joe McIntosh 1974–1975
- Tim McIntosh 1990–1996
- B. McIntyre 1924–1924
- Frank McIntyre 1883–1883
- Matty McIntyre 1901–1912
- Otto McIvor 1911–1911
- James McJames 1895–1901
- Archie McKain 1937–1943
- Hal McKain 1927–1932
- mckam01 1946–1946
- Brendan McKay 2019–2019
- Cody McKay 2002–2004
- Dave McKay 1975–1982
- David McKay 2019–2022
- Reeve McKay 1915–1915
- Ed McKean 1887–1899
- Bill McKechnie 1907–1920
- Frank McKee 1884–1884
- Jim McKee 1972–1973
- Red McKee 1913–1916
- Roger McKee 1943–1944
- Walt McKeel 1996–2002
- Jim McKeever 1884–1884
- Tim McKeithan 1932–1934
- John McKelvey 1875–1875
- Fred McKelvin 1942–1942
- Russ McKelvy 1878–1882
- Ed McKenna 1884–1884
- Frank McKenna 1874–1874
- Kit McKenna 1898–1899
- Patrick McKenna 1877–1877
- Ryan McKenna 2021–2024
- Frank McKenry 1915–1916
- Michael McKenry 2010–2016
- Triston McKenzie 2020–2025
- Joel McKeon 1986–1987
- Larry McKeon 1884–1886
- Dave McKeough 1890–1891
- mckin01 1922–1922
- Billy McKinney 2018–2025
- Bob McKinney 1901–1901
- Rich McKinney 1970–1977
- Gready McKinnis 1941–1945
- Alex McKinnon 1884–1887
- Zach McKinstry 2020–2025
- Andrew McKirahan 2015–2015
- Jeff McKnight 1989–1994
- Jim McKnight 1960–1962
- Tony McKnight 2000–2001
- Denny McLain 1963–1972
- Matt McLain 2023–2025
- Ed McLane 1907–1907
- Art McLarney 1932–1932
- Polly McLarry 1912–1915
- Barney McLaughlin 1884–1890
- Bo McLaughlin 1976–1982
- Byron McLaughlin 1977–1983
- Frank McLaughlin 1882–1884
- Henry McLaughlin 1913–1919
- Jim McLaughlin 1932–1932
- Jim McLaughlin 1884–1884
- Joey McLaughlin 1977–1984
- Jud McLaughlin 1931–1933
- Kid McLaughlin 1914–1914
- Pat McLaughlin 1937–1945
- Tom McLaughlin 1883–1891
- Warren McLaughlin 1900–1903
- William McLaughlin 1884–1884
- Felix McLaurin 1942–1946
- Jack McLaurin 1945–1948
- Ralph McLaurin 1908–1908
- Al McLean 1935–1935
- Larry McLean 1901–1915
- Nolan McLean 2025–2025
- Marty McLeary 2004–2007
- Wayne McLeland 1951–1952
- Mark McLemore 2007–2007
- Mark McLemore 1986–2004
- mclem01 1938–1938
- Jim McLeod 1930–1933
- Ralph McLeod 1938–1938
- Cal McLish 1944–1964
- Nate McLouth 2005–2014
- Sam McMackin 1902–1902
- Jack McMahan 1956–1956
- Doc McMahon 1908–1908
- Don McMahon 1957–1974
- Jack McMahon 1892–1893
- Ryan McMahon 2017–2025
- Sadie McMahon 1889–1897
- John McMakin 1902–1902
- Frank McManus 1899–1904
- Jim McManus 1960–1960
- Joe McManus 1913–1913
- Marty McManus 1920–1934
- Pat McManus 1879–1879
- Jimmy McMath 1968–1968
- Willie McMeans 1944–1945
- Greg McMichael 1993–2000
- George McMillan 1890–1890
- Norm McMillan 1922–1929
- Roy McMillan 1951–1966
- Tom McMillan 1977–1977
- Tommy McMillan 1908–1912
- Billy McMillon 1996–2004
- John McMillon 2023–2024
- Clarence McMullen 1945–1945
- Hugh McMullen 1925–1929
- Ken McMullen 1962–1977
- Fred McMullin 1914–1920
- James McMullin 1887–1887
- John McMullin 1871–1875
- Will McMurray 1909–1913
- Craig McMurtry 1983–1995
- Carl McNabb 1945–1945
- Edgar McNabb 1893–1893
- Eric McNair 1929–1942
- Hurley McNair 1912–1937
- Dave McNally 1962–1975
- Mike McNally 1915–1925
- Bob McNamara 1939–1939
- Dinny McNamara 1927–1928
- George McNamara 1922–1922
- Jim McNamara 1992–1993
- Tim McNamara 1922–1926
- Tom McNamara 1922–1922
- Gordon McNaughton 1932–1932
- Albert McNeal 1920–1920
- Clyde McNeal 1945–1948
- Harry McNeal 1901–1901
- Red McNeal 1930–1932
- Rusty McNealy 1983–1983
- Earl McNeely 1924–1931
- Jeff McNeely 1993–1993
- Willie McNeely 1946–1946
- Jeff McNeil 2018–2025
- Norm McNeil 1919–1919
- Jerry McNertney 1964–1973
- Brian McNichol 1999–1999
- Ed McNichol 1904–1904
- Bill McNulty 1969–1972
- Pat McNulty 1922–1927
- Frank McPartlin 1899–1899
- Bid McPhee 1882–1899
- Dallas McPherson 2004–2011
- John McPherson 1901–1904
- Kyle McPherson 2012–2012
- Herb McQuaid 1923–1926
- Mart McQuaid 1891–1898
- Jerry McQuaig 1934–1934
- John Henry McQueen 1944–1945
- Mike McQueen 1969–1974
- Pete McQueen 1932–1937
- Mox McQuery 1884–1891
- George McQuillan 1907–1918
- Hugh McQuillan 1918–1927
- Glenn McQuillen 1938–1947
- George McQuinn 1936–1948
- Alex McRae 2018–2021
- Brian McRae 1990–1999
- Hal McRae 1968–1987
- Norm McRae 1969–1970
- mcrem01 1884–1884
- Kevin McReynolds 1983–1994
- Pete McShannic 1888–1888
- Trick McSorley 1875–1886
- Paul McSweeney 1891–1891
- Jim McTamany 1885–1891
- Bill McTigue 1911–1916
- Cal McVey 1871–1879
- George McVey 1885–1885
- Doug McWeeny 1921–1930
- Bill McWilliams 1931–1931
- Larry McWilliams 1978–1990
- Bob Meacham 1983–1988
- Rusty Meacham 1991–2001
- Charlie Mead 1943–1945
- Curtis Mead 2023–2025
- Chick Meade 1916–1919
- Johnny Meador 1920–1920
- Austin Meadows 2018–2023
- Brian Meadows 1998–2006
- Lee Meadows 1915–1929
- Louie Meadows 1986–1990
- Parker Meadows 2023–2025
- Rufus Meadows 1926–1926
- Dave Meads 1987–1988
- George Meakim 1890–1895
- John Means 2018–2024
- Lewis Means 1920–1928
- Tom Means 1902–1902
- Charlie Meara 1914–1914
- Pat Meares 1993–2001
- Chris Mears 2003–2003
- Nick Mears 2020–2025
- Gil Meche 1999–2010
- Jim Mecir 1995–2005
- Wade Meckler 2023–2023
- Brandon Medders 2005–2010
- Ray Medeiros 1945–1945
- Lico Mederos 1910–1920
- Victor Mederos 2023–2025
- Tommy Medica 2013–2014
- Doc Medich 1972–1982
- Adonis Medina 2020–2022
- Luis Medina 1988–1991
- Luis Medina 2023–2024
- Lázaro Medina 1944–1945
- Pedro Medina 1906–1907
- Rafael Medina 1998–1999
- Yoervis Medina 2013–2015
- Kris Medlen 2009–2018
- Cal Medley 1946–1946
- Irv Medlinger 1949–1951
- Scott Medvin 1988–1990
- Joe Medwick 1932–1948
- Tommy Mee 1910–1910
- Pete Meegan 1884–1885
- Bill Meehan 1915–1915
- Dad Meek 1889–1890
- Evan Meek 2008–2014
- James Meeker 2024–2024
- Roy Meeker 1923–1926
- Jouett Meekin 1891–1900
- Sammy Meeks 1948–1951
- Phil Meeler 1972–1972
- Russ Meers 1941–1947
- Trevor Megill 2021–2025
- Tylor Megill 2021–2025
- Chase Meidroth 2025–2025
- Dave Meier 1984–1988
- Dutch Meier 1906–1906
- Heinie Meine 1922–1934
- Walt Meinert 1913–1913
- Bob Meinke 1910–1910
- Frank Meinke 1884–1885
- Ryan Meisinger 2018–2021
- George Meister 1884–1884
- John Meister 1886–1887
- Karl Meister 1913–1913
- Moxie Meixell 1912–1912
- Adalberto Mejia 2016–2019
- Alex Mejia 2017–2017
- Erick Mejia 2019–2020
- Francisco Mejia 2017–2023
- Humberto Mejia 2020–2021
- J. C. Mejia 2021–2023
- Jenrry Mejia 2010–2015
- Juan Mejia 2025–2025
- Miguel Mejia 1996–1996
- Roberto Mejia 1993–1997
- Roman Mejias 1955–1964
- Sam Mejias 1976–1981
- Seth Mejias-Brean 2019–2019
- Mark Melancon 2009–2022
- Dutch Mele 1937–1937
- Sam Mele 1947–1956
- Francisco Melendez 1984–1989
- Jose Melendez 1990–1994
- Luis Melendez 1970–1977
- MJ Melendez 2022–2025
- Adam Melhuse 2000–2008
- Kevin Melillo 2007–2007
- Oscar Melillo 1926–1937
- Keury Mella 2017–2021
- Joe Mellana 1927–1927
- Lefty Mellix 1934–1943
- Bill Mellor 1902–1902
- Juan Melo 2000–2000
- Jon Meloan 2007–2009
- Paul Meloan 1910–1911
- Steve Melter 1909–1909
- Babe Melton 1926–1929
- Bill Melton 1968–1977
- Cliff Melton 1937–1944
- Dave Melton 1956–1958
- Jacob Melton 2025–2025
- Rube Melton 1941–1947
- Troy Melton 2025–2025
- melto01 1916–1916
- Mitch Meluskey 1998–2003
- Tim Melville 2016–2019
- Bob Melvin 1985–1994
- Cristian Mena 2024–2025
- Kevin Mench 2002–2010
- Adalberto Mendez 2010–2010
- Carlos Mendez 2003–2003
- Donaldo Mendez 2001–2003
- Roman Mendez 2014–2015
- Yohander Mendez 2016–2019
- Danny Mendick 2019–2024
- Carlos Mendoza 1997–2000
- Luis Mendoza 2007–2013
- Mario Mendoza 1974–1982
- Mike Mendoza 1979–1979
- Minnie Mendoza 1970–1970
- Ramiro Mendoza 1996–2005
- Frank Menechino 1999–2005
- John Menefee 1892–1903
- Tony Menendez 1992–1994
- Joey Meneses 2022–2024
- Conner Menez 2019–2022
- Daniel Mengden 2016–2022
- Paul Menhart 1995–1997
- Denis Menke 1962–1974
- Mike Menosky 1914–1923
- Ed Mensor 1912–1914
- Ted Menze 1918–1918
- Mike Meola 1933–1936
- Rudy Meoli 1971–1979
- Hector Mercado 2000–2003
- Michael Mercado 2024–2025
- Orlando Mercado 1982–1990
- Oscar Mercado 2019–2023
- Orlando Merced 1990–2003
- Henry Mercedes 1992–1997
- Jose Mercedes 1994–2003
- Luis Mercedes 1991–1993
- Melvin Mercedes 2014–2014
- Yermin Mercedes 2020–2022
- Jack Mercer 1910–1910
- John Mercer 1912–1912
- Jordy Mercer 2012–2021
- Mark Mercer 1981–1981
- Win Mercer 1894–1902
- Andy Merchant 1975–1976
- Henry Merchant 1940–1948
- Kent Mercker 1989–2008
- Cla Meredith 2005–2010
- Geechie Meredith 1923–1930
- Spike Merena 1934–1934
- Art Merewether 1922–1922
- Ron Meridith 1984–1987
- Fred Merkle 1907–1926
- Lou Merloni 1998–2006
- Whit Merrifield 2016–2024
- Ed Merrill 1882–1884
- Jackson Merrill 2024–2025
- Brett Merriman 1993–1994
- Lloyd Merriman 1949–1955
- Bill Merritt 1891–1899
- Bill Merritt 1905–1907
- Chute Merritt 1934–1934
- George Merritt 1901–1903
- Herm Merritt 1921–1921
- Jim Merritt 1965–1975
- John Merritt 1913–1913
- Lloyd Merritt 1957–1957
- Ryan Merritt 2016–2017
- Albert Merriwether 1929–1929
- John Merriwether 1932–1932
- Julian Merryweather 2020–2025
- Jack Merson 1951–1953
- Sam Mertes 1896–1906
- Jim Mertz 1943–1943
- Lennie Merullo 1941–1947
- Matt Merullo 1989–1995
- Matt Mervis 2023–2025
- Andrés Mesa 1948–1948
- Jose Mesa 1987–2007
- Melky Mesa 2012–2013
- Pablo Mesa 1921–1927
- Victor Mesa 2025–2025
- Steve Mesner 1938–1945
- Devin Mesoraco 2011–2018
- Andrew Messenger 1924–1924
- Bobby Messenger 1909–1914
- Randy Messenger 2005–2009
- Andy Messersmith 1968–1979
- Parker Messick 2025–2025
- Tom Messitt 1899–1899
- Tom Metcalf 1963–1963
- Travis Metcalf 2007–2008
- Alfred Metcalfe 1875–1875
- Mike Metcalfe 1998–2000
- Frank Metha 1940–1940
- Bud Metheny 1943–1946
- Dewey Metivier 1922–1924
- George Metkovich 1943–1954
- Charlie Metro 1943–1945
- Lenny Metz 1923–1925
- Butch Metzger 1974–1978
- Roger Metzger 1970–1980
- William Metzig 1944–1944
- Alex Metzler 1925–1930
- Hensley Meulens 1989–1998
- Bob Meusel 1920–1930
- Irish Meusel 1914–1927
- mexio01 1925–1925
- Luis Mey 2025–2025
- Alex Meyer 2015–2017
- Ben Meyer 2018–2018
- Benny Meyer 1913–1925
- Billy Meyer 1913–1917
- Bob Meyer 1964–1970
- Brian Meyer 1988–1990
- Dan Meyer 2004–2010
- Dan Meyer 1974–1985
- Drew Meyer 2006–2006
- Dutch Meyer 1937–1946
- George Meyer 1938–1938
- Jack Meyer 1955–1961
- Joey Meyer 1988–1989
- Lee Meyer 1909–1909
- Max Meyer 2022–2025
- Russ Meyer 1946–1959
- Scott Meyer 1978–1978
- Levi Meyerle 1871–1884
- Chad Meyers 1999–2003
- Deacon Meyers 1921–1926
- George Meyers 1890–1890
- Jack Meyers 1909–1917
- Jake Meyers 2021–2025
- Lou Meyers 1884–1884
- Bart Miadich 2001–2003
- Dan Miceli 1993–2006
- Mickey Micelotta 1954–1955
- Gene Michael 1966–1975
- Cass Michaels 1943–1954
- Jason Michaels 2001–2011
- John Michaels 1932–1932
- Ralph Michaels 1924–1926
- John Michaelson 1921–1921
- Chris Michalak 1998–2006
- Ed Mickelson 1950–1957
- Glenn Mickens 1953–1953
- James Mickey 1940–1940
- John Mickey 1907–1907
- Kam Mickolio 2008–2011
- Jason Middlebrook 2001–2003
- Will Middlebrooks 2012–2017
- Jim Middleton 1917–1921
- John Middleton 1922–1922
- Keynan Middleton 2017–2023
- Dick Midkiff 1938–1938
- Ezra Midkiff 1909–1913
- Gary Mielke 1987–1990
- Doug Mientkiewicz 1998–2009
- Ed Mierkowicz 1945–1950
- Matt Mieske 1993–2000
- Larry Miggins 1948–1952
- John Mihalic 1935–1937
- Jose Mijares 2008–2013
- Pete Mikkelsen 1964–1972
- Hank Miklos 1944–1944
- Miles Mikolas 2012–2025
- Eddie Miksis 1944–1958
- Bob Milacki 1988–1996
- Clyde Milan 1907–1922
- Horace Milan 1915–1917
- Larry Milbourne 1974–1984
- Mike Milchin 1996–1996
- Aaron Miles 2003–2011
- Carl Miles 1940–1940
- Dee Miles 1935–1943
- Don Miles 1958–1958
- Jim Miles 1968–1969
- Jimmy Miles 1934–1935
- John Miles 1946–1948
- Willie Miles 1924–1927
- Zell Miles 1937–1940
- Mike Miley 1975–1976
- Wade Miley 2011–2025
- Sam Militello 1992–1993
- Johnny Miljus 1915–1929
- Felix Millan 1966–1977
- Kevin Millar 1998–2009
- Frank Millard 1890–1890
- Drew Millas 2023–2025
- Lastings Milledge 2006–2011
- A. Miller 1927–1927
- Andrew Miller 2006–2021
- Bert Miller 1897–1897
- Bill Miller 1952–1955
- Bill Miller 1902–1902
- Bill Miller 1937–1937
- Bing Miller 1921–1936
- Bob Miller 1890–1891
- Bob Miller 1949–1958
- Bob Miller 1953–1962
- Bob Miller 1923–1932
- Bob Miller 1957–1974
- Bobby Miller 2023–2025
- Brad Miller 2013–2023
- Brian Miller 2021–2021
- Bruce Miller 1973–1976
- Bryce Miller 2023–2025
- Bub Miller 1938–1938
- Buck Miller 1924–1930
- Cannon Ball Miller 1899–1906
- Charlie Miller 1915–1915
- Charlie Miller 1912–1912
- Chuck Miller 1913–1914
- Claude Miller 1937–1937
- Corky Miller 2001–2013
- Cyclone Miller 1884–1886
- Damian Miller 1997–2007
- Darrell Miller 1984–1988
- Doc Miller 1910–1914
- Dots Miller 1909–1921
- Dusty Miller 1902–1902
- Dusty Miller 1889–1899
- Dyar Miller 1975–1981
- Ed Miller 1884–1884
- Ed Miller 1912–1918
- Eddie Miller 1977–1984
- Eddie Miller 1936–1950
- Elmer Miller 1912–1922
- Elmer Miller 1929–1929
- Erik Miller 2024–2025
- Flash Miller 1934–1945
- Frank Miller 1891–1891
- Frank Miller 1913–1923
- Fred Miller 1910–1910
- George Miller 1884–1896
- George Miller 1877–1884
- Hack Miller 1916–1925
- Hack Miller 1944–1945
- Henry Miller 1938–1948
- Hub Miller 1911–1916
- Hughie Miller 1911–1915
- Ian Miller 2019–2020
- J. Miller 1930–1930
- Jackie Miller 1938–1938
- Jai Miller 2008–2011
- Jake Miller 1922–1922
- Jake Miller 1924–1933
- Jason Miller 2007–2007
- Jim Miller 1901–1901
- Jim Miller 2008–2014
- Joe Miller 1872–1875
- Joe Miller 1884–1885
- John Miller 1962–1967
- John Miller 1966–1969
- Justin Miller 2002–2010
- Justin Miller 2014–2021
- Keith Miller 1987–1995
- Keith Miller 1988–1989
- Kohly Miller 1892–1897
- Kurt Miller 1994–1999
- Larry Miller 1964–1966
- Lemmie Miller 1984–1984
- Louis Miller 1910–1923
- Mason Miller 2023–2025
- Matt Miller 2001–2002
- Matt Miller 2003–2007
- Mike Miller 2016–2016
- Ned Miller 1937–1937
- Norm Miller 1965–1974
- Orlando Miller 1994–1997
- Otis Miller 1927–1932
- Otto Miller 1910–1922
- Owen Miller 2021–2025
- Ox Miller 1943–1947
- Paul Miller 1991–1993
- Percy Miller 1921–1937
- Ralph Miller 1921–1921
- Ralph Miller 1920–1924
- Ralph Miller 1898–1899
- Randy Miller 1977–1978
- Ray Miller 1917–1917
- Red Miller 1923–1923
- Rick Miller 1971–1985
- Rod Miller 1957–1957
- Roger Miller 1974–1974
- Ronny Miller 1941–1941
- Roscoe Miller 1901–1904
- Rudy Miller 1929–1929
- Russ Miller 1927–1928
- Ryan Miller 2024–2024
- Shelby Miller 2012–2025
- Stu Miller 1952–1968
- Tom Miller 1874–1875
- Tom Miller 1918–1919
- Travis Miller 1996–2002
- Trever Miller 1996–2011
- Tyson Miller 2020–2024
- Wade Miller 1999–2007
- Wadel Miller 1940–1942
- Walt Miller 1911–1911
- Ward Miller 1909–1917
- Warren Miller 1909–1911
- Whitey Miller 1944–1944
- mille01 1912–1912
- mille02 1929–1929
- Joe Millette 1992–1993
- millh01 1932–1932
- Ralph Milliard 1996–1998
- Wally Millies 1934–1941
- Billy Milligan 1901–1904
- John Milligan 1884–1893
- John Milligan 1928–1934
- Randy Milligan 1987–1994
- Bob Milliken 1953–1954
- Eugene Milliner 1906–1912
- Harold Millon 1946–1947
- Alan Mills 1990–2001
- Alec Mills 2016–2023
- Art Mills 1927–1928
- Bill Mills 1944–1944
- Brad Mills 2009–2015
- Brad Mills 1980–1983
- Buster Mills 1934–1946
- Charlie Mills 1871–1872
- Dick Mills 1970–1970
- Everett Mills 1871–1876
- Frank Mills 1914–1914
- Howard Mills 1934–1940
- Jack Mills 1911–1911
- Rupert Mills 1915–1915
- Willie Mills 1901–1901
- Wyatt Mills 2021–2022
- Kevin Millwood 1997–2012
- Al Milnar 1936–1946
- Pete Milne 1948–1950
- Brian Milner 1978–1978
- Eddie Milner 1980–1988
- Hoby Milner 2017–2025
- John Milner 1971–1982
- Tommy Milone 2011–2023
- Mike Milosevich 1944–1945
- George Milstead 1924–1926
- Art Milton 1943–1943
- C. Milton 1933–1933
- Eric Milton 1998–2009
- Henry Milton 1932–1940
- Larry Milton 1903–1903
- Mike Mimbs 1995–1997
- Cotton Minahan 1907–1907
- Rudy Minarcin 1955–1957
- Juan Minaya 2016–2022
- Don Mincher 1960–1972
- Ed Mincher 1871–1872
- Nate Minchey 1993–1997
- Purnell Mincy 1938–1940
- Ray Miner 1921–1921
- Zach Miner 2006–2013
- Craig Minetto 1978–1981
- Steve Mingori 1970–1979
- Dan Minnehan 1895–1895
- Paul Minner 1946–1956
- Don Minnick 1957–1957
- Blas Minor 1992–1997
- Damon Minor 2000–2004
- George Minor 1944–1948
- Mike Minor 2010–2022
- Ryan Minor 1998–2001
- Jim Minshall 1974–1975
- A. J. Minter 2017–2025
- Greg Minton 1975–1990
- Steve Mintz 1995–1999
- Gino Minutelli 1990–1993
- Antonio Mirabal 1939–1940
- Juanelo Mirabal 1921–1929
- Paul Mirabella 1978–1990
- Doug Mirabelli 1996–2007
- Angel Miranda 1993–1997
- Ariel Miranda 2016–2018
- Jose Miranda 2022–2025
- Juan Miranda 2008–2011
- Willy Miranda 1951–1959
- Pedro Miró 1945–1948
- Pat Misch 2006–2011
- Anthony Misiewicz 2020–2025
- Jacob Misiorowski 2025–2025
- Kameron Misner 2024–2025
- John Misse 1914–1914
- Jim Missouri 1937–1940
- Mike Misuraca 1997–1997
- Alonzo Mitchell 1926–1941
- Arnett Mitchell 1921–1926
- Bo Mitchell 1932–1938
- Bobby Mitchell 1980–1983
- Bobby Mitchell 1877–1882
- Bobby Mitchell 1970–1975
- Bryan Mitchell 2014–2021
- Bud Mitchell 1929–1935
- Cal Mitchell 2022–2023
- Charlie Mitchell 1984–1985
- Clarence Mitchell 1911–1932
- Clarence Mitchell 1938–1938
- Craig Mitchell 1975–1977
- D. J. Mitchell 2012–2012
- Dale Mitchell 1946–1956
- Fred Mitchell 1901–1913
- Garrett Mitchell 2022–2025
- George Mitchell 1924–1941
- Joe Mitchell 1932–1932
- John Mitchell 1986–1990
- Johnny Mitchell 1921–1925
- Keith Mitchell 1991–1998
- Kevin Mitchell 1984–1998
- Larry Mitchell 1996–1996
- Mike Mitchell 1907–1914
- Monroe Mitchell 1923–1923
- Otto Mitchell 1930–1931
- Paul Mitchell 1975–1980
- Robert Mitchell 1923–1924
- Roy Mitchell 1910–1919
- Russ Mitchell 2010–2011
- Tee Mitchell 1939–1939
- Willie Mitchell 1909–1919
- mitch01 1900–1900
- Sergio Mitre 2003–2011
- Ralph Mitterling 1916–1916
- George Mitterwald 1966–1977
- Casey Mize 2020–2025
- Johnny Mize 1936–1953
- Vinegar Bend Mizell 1952–1962
- John Mizerock 1983–1989
- Bill Mizeur 1923–1924
- Minnie Miñoso 1946–1980
- Dave Mlicki 1992–2002
- Carmen Mlodzinski 2023–2025
- Kevin Mmahat 1989–1989
- Dave Moates 1974–1976
- Garrett Mock 2008–2010
- Mike Modak 1945–1945
- Brian Moehler 1996–2010
- Chad Moeller 2000–2010
- Danny Moeller 1907–1916
- Dennis Moeller 1992–1993
- Joe Moeller 1962–1971
- Ron Moeller 1956–1963
- Joe Moffet 1884–1884
- Sam Moffet 1884–1888
- Randy Moffitt 1972–1983
- Herb Moford 1955–1962
- George Mogridge 1911–1927
- John Mohardt 1922–1922
- George Mohart 1920–1921
- Kid Mohler 1894–1894
- Mike Mohler 1993–2001
- Dale Mohorcic 1986–1990
- Dustan Mohr 2001–2007
- Bill Moisan 1953–1953
- Johnny Mokan 1921–1927
- Fenton Mole 1949–1949
- Carlton Molesworth 1895–1895
- Anthony Molina 2024–2025
- Bengie Molina 1998–2010
- Gabe Molina 1999–2003
- Guillermo Molina 1929–1930
- Gustavo Molina 2007–2011
- Izzy Molina 1996–2002
- Jose Molina 1999–2014
- Tinti Molina 1906–1917
- Yadier Molina 2004–2022
- Bob Molinaro 1975–1983
- Paul Molitor 1978–1998
- Sam Moll 2017–2025
- Dustin Molleken 2016–2016
- Fred Mollenkamp 1914–1914
- Fritz Mollwitz 1913–1919
- Richie Moloney 1970–1970
- Vince Molyneaux 1917–1918
- Blas Monaco 1937–1946
- Rinty Monahan 1953–1953
- Shane Monahan 1998–1999
- Andruw Monasterio 2023–2025
- Carlos Monasterios 2010–2010
- Bill Monbouquette 1958–1968
- Yoan Moncada 2016–2025
- Freddie Moncewicz 1928–1928
- Alex Monchak 1940–1940
- Carlos Moncrief 2017–2017
- Rick Monday 1966–1984
- monde01 1945–1945
- Adalberto Mondesi 2016–2022
- Raul Mondesi 1993–2005
- Nate Mondou 2022–2022
- Johnny Monell 2013–2015
- Don Money 1968–1983
- Sid Monge 1975–1984
- Sam Mongin 1907–1922
- Mickey Moniak 2020–2025
- Bill Monroe 1899–1914
- Craig Monroe 2001–2009
- Douglass Monroe 1927–1927
- Ed Monroe 1917–1918
- Frank Monroe 1884–1884
- John Monroe 1921–1921
- Larry Monroe 1976–1976
- Zach Monroe 1958–1959
- Ed Montague 1928–1932
- John Montague 1973–1980
- Estéban Montalvo 1923–1928
- Rafael Montalvo 1986–1986
- Luis Montanez 2008–2011
- Willie Montanez 1966–1982
- Frankie Montas 2015–2025
- Aurelio Monteagudo 1963–1973
- Rene Monteagudo 1938–1945
- John Montefusco 1974–1986
- Manny Montejo 1961–1961
- Rich Monteleone 1987–1996
- Felipe Montemayor 1953–1955
- Agustin Montero 2006–2006
- Elehuris Montero 2022–2024
- Jesus Montero 2011–2015
- Keider Montero 2024–2025
- Miguel Montero 2006–2018
- Rafael Montero 2014–2025
- Coco Montes 2023–2025
- Patrick Monteverde 2025–2025
- Al Montgomery 1941–1941
- Bob Montgomery 1970–1979
- Colson Montgomery 2025–2025
- Jeff Montgomery 1987–1999
- Jordan Montgomery 2017–2024
- Mason Montgomery 2024–2025
- Mike Montgomery 2015–2020
- Monty Montgomery 1971–1972
- Ray Montgomery 1996–1998
- Steve Montgomery 1996–2000
- Charlie Montoyo 1993–1993
- Al Montreuil 1972–1972
- Luke Montz 2008–2013
- Ramon Monzant 1954–1960
- Dan Monzon 1972–1973
- Joe Moock 1967–1967
- Blanch Moody 1940–1940
- Eric Moody 1997–1997
- Lee Moody 1944–1947
- Willis Moody 1929–1929
- moody01 1922–1922
- George Moolic 1886–1886
- Leo Moon 1932–1932
- Wally Moon 1954–1965
- Jim Mooney 1931–1934
- Bill Mooneyham 1986–1986
- Adam Moore 2009–2018
- Al Moore 1925–1926
- Andrew Moore 2017–2019
- Anse Moore 1946–1946
- Archie Moore 1964–1965
- Balor Moore 1970–1980
- Barry Moore 1965–1970
- Bill Moore 1986–1986
- Bill Moore 1925–1925
- Bill Moore 1926–1927
- Bobby Moore 1991–1991
- Bobby Moore 1985–1985
- Brad Moore 1988–1990
- Carlos Moore 1930–1930
- Charley Moore 1912–1912
- Charlie Moore 1973–1987
- Christian Moore 2025–2025
- Clarence Moore 1928–1928
- Cy Moore 1929–1934
- Dee Moore 1936–1946
- Dobie Moore 1920–1926
- Donnie Moore 1975–1988
- Dylan Moore 2019–2025
- Earl Moore 1901–1914
- Eddie Moore 1923–1934
- Euel Moore 1934–1936
- Eugene Moore 1910–1921
- Ferdie Moore 1914–1914
- Frank Moore 1905–1905
- Gary Moore 1970–1970
- Gene Moore 1931–1945
- Gene Moore 1909–1912
- Harry Moore 1897–1913
- Henry Moore 1884–1884
- Jack Moore 1939–1939
- Jackie Moore 1965–1965
- Jeremy Moore 2011–2011
- Jerry Moore 1884–1885
- Jim Moore 1928–1932
- Jimmy Moore 1930–1931
- Jo-Jo Moore 1930–1941
- Johnny Moore 1928–1945
- Junior Moore 1976–1980
- Kelvin Moore 1981–1983
- Kerwin Moore 1996–1996
- Marcus Moore 1993–1996
- Matt Moore 2011–2024
- McKinley Moore 2023–2023
- Mike Moore 1982–1995
- Molly Moore 1875–1875
- Pete Moore 1929–1929
- Ralph Moore 1923–1923
- Randy Moore 1927–1937
- Ray Moore 1952–1963
- Red Moore 1936–1940
- Robert Moore 1946–1946
- Roy Moore 1920–1923
- Roy Moore 1922–1922
- Scott Moore 2006–2012
- Scrappy Moore 1917–1917
- Square Moore 1923–1928
- Terry Moore 1935–1948
- Tommy Moore 1972–1977
- Trey Moore 1998–2001
- Tyler Moore 2012–2017
- Whitey Moore 1936–1942
- Wilcy Moore 1927–1933
- moore01 1942–1942
- Bob Moorhead 1962–1965
- Bob Moose 1967–1976
- Jake Mooty 1936–1944
- Andres Mora 1976–1980
- Melvin Mora 1999–2011
- David Moraga 2000–2000
- Cándido Morales 1948–1948
- Francisco Morales 2022–2022
- Franklin Morales 2007–2016
- Jerry Morales 1969–1983
- Jose Morales 2007–2011
- Jose Morales 1973–1984
- Kendrys Morales 2006–2019
- Luis Morales 2025–2025
- Osmer Morales 2018–2018
- Rich Morales 1967–1974
- Willie Morales 2000–2000
- Al Moran 1963–1964
- Bill Moran 1974–1974
- Bill Moran 1892–1895
- Billy Moran 1958–1965
- Brian Moran 2019–2022
- Charles Moran 1903–1905
- Charlie Moran 1903–1908
- Colin Moran 2016–2022
- Harry Moran 1912–1915
- Herbie Moran 1908–1915
- Hiker Moran 1938–1939
- Jovani Moran 2021–2025
- Pat Moran 1901–1914
- Roy Moran 1912–1912
- Sam Moran 1895–1895
- Mickey Morandini 1990–2000
- Jose Morban 2003–2003
- Mike Mordecai 1994–2005
- Forrest More 1909–1909
- Ray Morehart 1924–1927
- Dave Morehead 1963–1970
- Seth Morehead 1957–1961
- Adrian Morejon 2019–2025
- Danny Morejon 1958–1958
- Brent Morel 2010–2015
- Christopher Morel 2022–2025
- Ramon Morel 1995–1997
- Keith Moreland 1978–1989
- Mitch Moreland 2010–2021
- Nate Moreland 1940–1945
- Harry Morelock 1891–1892
- Lew Moren 1903–1910
- Angel Moreno 1981–1982
- Diego Moreno 2015–2017
- Edwin Moreno 2009–2009
- Gabriel Moreno 2022–2025
- Jose Moreno 1980–1982
- Juan Moreno 2001–2002
- Julio Moreno 1950–1953
- Omar Moreno 1975–1986
- Orber Moreno 1999–2004
- Roger Moret 1970–1978
- Dauri Moreta 2021–2025
- Dave Morey 1913–1913
- Adam Morgan 2015–2021
- Bill Morgan 1884–1884
- Bill Morgan 1882–1884
- Bobby Morgan 1950–1958
- Chet Morgan 1935–1938
- Cy Morgan 1921–1922
- Cy Morgan 1903–1913
- David Morgan 2025–2025
- Ed Morgan 1928–1934
- Eddie Morgan 1936–1937
- Eli Morgan 2021–2025
- Joe Morgan 1963–1984
- Joe Morgan 1959–1964
- Kevin Morgan 1997–1997
- Leon Morgan 1928–1928
- Mike Morgan 1978–2002
- Nyjer Morgan 2007–2014
- Pepper Morgan 1937–1938
- Pidgey Morgan 1875–1878
- Ray Morgan 1911–1918
- Red Morgan 1906–1906
- Sack Morgan 1945–1948
- Tom Morgan 1951–1963
- Vern Morgan 1954–1955
- morga01 1936–1936
- Moe Morhardt 1961–1962
- Bill Moriarty 1909–1909
- Ed Moriarty 1935–1936
- Gene Moriarty 1884–1892
- George Moriarty 1903–1916
- Mike Moriarty 2002–2002
- Juan Morillo 2025–2025
- Juan Morillo 2006–2009
- Shawn Morimando 2016–2021
- Mike Morin 2014–2020
- John Morlan 1973–1974
- Bill Morley 1913–1913
- Alvin Morman 1996–1999
- Russ Morman 1986–1997
- Justin Morneau 2003–2016
- Leroy Morney 1932–1944
- Max Moroff 2016–2021
- Dan Morogiello 1983–1983
- Jim Moroney 1906–1912
- Jeff Moronko 1984–1987
- Reyes Moronta 2017–2023
- Bill Morrell 1926–1931
- John Morrill 1876–1890
- A. J. Morris 2016–2016
- Akeel Morris 2015–2018
- Al Morris 1930–1930
- Barney Morris 1932–1948
- Bryan Morris 2012–2017
- Charlie Morris 1936–1936
- Cody Morris 2022–2023
- Danny Morris 1968–1969
- Doyt Morris 1937–1937
- Ed Morris 1884–1890
- Ed Morris 1922–1931
- Hal Morris 1988–2000
- Jack Morris 1977–1994
- James Morris 1884–1884
- Jim Morris 1999–2000
- John Morris 1966–1974
- John Morris 1986–1992
- Matt Morris 1997–2008
- Pete Morris 1884–1884
- Walter Morris 1908–1908
- Warren Morris 1999–2003
- Yellow Horse Morris 1924–1930
- Bill Morrisette 1915–1920
- Felton Morrison 1943–1943
- Guy Morrison 1927–1928
- Hank Morrison 1887–1887
- Jim Morrison 1977–1988
- Jimmy Morrison 1930–1930
- Johnny Morrison 1920–1930
- Jon Morrison 1884–1887
- Logan Morrison 2010–2020
- Mike Morrison 1887–1890
- Phil Morrison 1921–1921
- Tom Morrison 1895–1896
- Frank Morrissey 1901–1902
- Jack Morrissey 1902–1903
- John Morrissey 1881–1881
- Joseph Morrissey 1932–1936
- Tom Morrissey 1882–1884
- Brandon Morrow 2007–2018
- Bud Morse 1929–1929
- Hap Morse 1911–1911
- Mike Morse 2005–2017
- Roy Morse 1917–1917
- Clayton Mortensen 2009–2013
- Bubba Morton 1961–1969
- Carl Morton 1969–1976
- Charlie Morton 2008–2025
- Charlie Morton 1882–1885
- Colt Morton 2007–2008
- Guy Morton 1954–1954
- Guy Morton 1914–1924
- Kevin Morton 1991–1991
- Sparrow Morton 1884–1884
- Sy Morton 1940–1947
- Walt Moryn 1954–1961
- Carlos Morán 1906–1914
- Francisco Morán 1911–1911
- Eugenio Morín 1921–1922
- Ross Moschitto 1965–1967
- Guillermo Moscoso 2009–2013
- Jon Moscot 2015–2016
- Robert Mosebach 2009–2009
- Lloyd Moseby 1980–1991
- Dustin Moseley 2006–2012
- Earl Moseley 1913–1916
- Arnie Moser 1937–1937
- Walter Moser 1906–1911
- Jerry Moses 1965–1975
- John Moses 1982–1992
- Lefty Moses 1938–1940
- Wally Moses 1935–1951
- Paul Moskau 1977–1983
- Doc Moskiman 1910–1910
- Daniel Moskos 2011–2011
- C. D. Mosley 1935–1935
- Jim Mosolf 1929–1933
- Julio Mosquera 1996–2005
- Brandon Moss 2007–2017
- Charlie Moss 1934–1936
- Damian Moss 2001–2004
- Howie Moss 1942–1946
- Les Moss 1946–1958
- Mal Moss 1930–1930
- Porter Moss 1932–1944
- Ray Moss 1926–1931
- Don Mossi 1954–1965
- Earl Mossor 1951–1951
- Johnny Mostil 1918–1929
- Andy Mota 1991–1991
- Danny Mota 2000–2000
- Guillermo Mota 1999–2012
- Jose Mota 1991–1995
- Manny Mota 1962–1982
- Dink Mothell 1920–1934
- Darryl Motley 1981–1987
- Bitsy Mott 1945–1945
- Jason Motte 2008–2017
- Taylor Motter 2016–2023
- Chad Mottola 1996–2006
- Curt Motton 1967–1974
- Frank Motz 1890–1894
- Glen Moulder 1946–1948
- Allie Moulton 1911–1911
- Tony Mounce 2003–2003
- Frank Mountain 1880–1886
- Ryan Mountcastle 2020–2025
- Bill Mountjoy 1883–1885
- Mike Moustakas 2011–2023
- James Mouton 1994–2001
- Lyle Mouton 1995–2001
- Ray Mowe 1913–1913
- Mike Mowrey 1905–1917
- Joe Mowry 1933–1935
- Gabriel Moya 2017–2018
- Steven Moya 2014–2016
- Ed Moyer 1910–1910
- Jamie Moyer 1986–2012
- Peter Moylan 2006–2018
- Mike Moynahan 1880–1884
- Ron Mrozinski 1954–1955
- Zach Muckenhirn 2023–2023
- Phil Mudrock 1963–1963
- Bill Mueller 1996–2006
- Bill Mueller 1942–1945
- Don Mueller 1948–1959
- Emmett Mueller 1938–1941
- Gordie Mueller 1950–1950
- Heinie Mueller 1920–1935
- Les Mueller 1941–1945
- Ray Mueller 1935–1951
- Walter Mueller 1922–1926
- Willie Mueller 1978–1981
- Billy Muffett 1957–1962
- Joe Muich 1924–1924
- Joe Muir 1951–1952
- Edward Mujica 2006–2017
- Jose Mujica 2020–2020
- Hugh Mulcahy 1935–1947
- Mark Mulder 2000–2008
- Mike Muldoon 1882–1886
- Terry Mulholland 1986–2006
- Tony Mullane 1881–1894
- Greg Mulleavy 1930–1933
- Conor Mullee 2016–2016
- A. Mullen 1928–1928
- Billy Mullen 1920–1928
- Charlie Mullen 1910–1916
- Ford Mullen 1944–1944
- Jim Mullen 1904–1905
- Martin Mullen 1872–1872
- Scott Mullen 2000–2003
- Freddie Muller 1933–1934
- Kyle Muller 2021–2024
- Dick Mulligan 1941–1947
- Eddie Mulligan 1915–1928
- Joe Mulligan 1934–1934
- John Mulligan 1884–1884
- Sean Mulligan 1996–1996
- George Mullin 1902–1915
- Henry Mullin 1884–1884
- John Mullin 1876–1876
- Pat Mullin 1940–1953
- Rance Mulliniks 1977–1992
- Cedric Mullins 2018–2025
- Fran Mullins 1980–1986
- Greg Mullins 1998–1998
- Dominic Mulrenan 1921–1921
- Frank Mulroney 1930–1930
- Joe Mulvey 1883–1895
- Kevin Mulvey 2009–2010
- Jerry Mumphrey 1974–1988
- John Munce 1884–1884
- Jake Munch 1918–1918
- Bob Muncrief 1937–1951
- Max Muncy 2025–2025
- Max Muncy 2015–2025
- George Mundinger 1884–1884
- Bill Mundy 1913–1913
- Red Munger 1943–1956
- John Mungin 1925–1927
- Van Mungo 1931–1945
- Carlos Muniz 2007–2008
- Manny Muniz 1971–1971
- Horatio Munn 1875–1875
- Scott Munninghoff 1980–1980
- Les Munns 1934–1936
- Daniel Muno 2015–2015
- Andres Munoz 2019–2025
- Arnie Munoz 2004–2007
- Bobby Munoz 1993–2001
- Jose Munoz 1996–1996
- Mike Munoz 1989–2000
- Noe Munoz 1995–1995
- Oscar Munoz 1995–1995
- Pedro Munoz 1990–1996
- Yairo Munoz 2018–2022
- Peter Munro 1999–2004
- Eric Munson 2000–2009
- Joe Munson 1925–1926
- Red Munson 1905–1905
- Thurman Munson 1969–1979
- Scott Munter 2005–2007
- John Munyan 1887–1891
- Steve Mura 1978–1985
- Masanori Murakami 1964–1965
- Toru Murata 2015–2015
- Bobby Murcer 1965–1983
- Simmy Murch 1904–1908
- Tim Murchison 1917–1920
- Wilbur Murdoch 1908–1908
- Noah Murdock 2025–2025
- murdo01 1924–1924
- Penn Murfee 2022–2025
- Red Murff 1956–1957
- Tim Murnane 1872–1884
- Bill Murphy 2007–2009
- Billy Murphy 1966–1966
- Bob Murphy 1890–1890
- Buzz Murphy 1918–1919
- Charles Murphy 1917–1917
- Chris Murphy 2023–2025
- Clarence Murphy 1886–1886
- Con Murphy 1884–1890
- Connie Murphy 1893–1894
- Dale Murphy 1976–1993
- Dan Murphy 1989–1989
- Daniel Murphy 2008–2020
- Danny Murphy 1960–1970
- Danny Murphy 1900–1915
- Danny Murphy 1892–1892
- Dave Murphy 1905–1905
- David Murphy 2006–2015
- Dick Murphy 1954–1954
- Donnie Murphy 2004–2014
- Dwayne Murphy 1978–1989
- Ed Murphy 1898–1903
- Ed Murphy 1942–1942
- Eddie Murphy 1912–1926
- Frank Murphy 1901–1901
- Herbert Murphy 1914–1914
- Howard Murphy 1909–1909
- J. R. Murphy 2013–2020
- Joe Murphy 1886–1887
- John Murphy 1884–1884
- John Murphy 1902–1903
- Johnny Murphy 1932–1947
- Larry Murphy 1891–1891
- Leo Murphy 1915–1915
- Mike Murphy 1912–1916
- Morgan Murphy 1890–1901
- Pat Murphy 1887–1890
- Patrick Murphy 2020–2022
- Rob Murphy 1985–1995
- Sean Murphy 2019–2025
- Tom Murphy 2015–2024
- Tom Murphy 1968–1979
- Tommy Murphy 2006–2007
- Tony Murphy 1884–1884
- Walter Murphy 1931–1931
- Willie Murphy 1884–1884
- Yale Murphy 1894–1897
- murph01 1884–1884
- murph02 1922–1922
- murph03 1915–1915
- murph04 1930–1930
- A. J. Murray 2007–2008
- Amby Murray 1936–1936
- Bill Murray 1917–1917
- Bobby Murray 1923–1923
- Calvin Murray 1999–2004
- Colton Murray 2015–2016
- Cowboy Murray 1940–1943
- Dale Murray 1974–1985
- Dan Murray 1999–2000
- Ed Murray 1917–1917
- Eddie Murray 1977–1997
- George Murray 1922–1933
- Glenn Murray 1996–1996
- Heath Murray 1997–2002
- Jayden Murray 2025–2025
- Jim Murray 1902–1914
- Jim Murray 1922–1922
- Joe Murray 1950–1950
- Larry Murray 1974–1979
- Matt Murray 1995–1995
- Miah Murray 1884–1891
- Mitchell Murray 1920–1932
- Pat Murray 1919–1919
- Ray Murray 1948–1954
- Red Murray 1906–1917
- Rich Murray 1980–1983
- Tom Murray 1894–1894
- Tony Murray 1923–1923
- murra01 1938–1938
- Ivan Murrell 1963–1974
- Danny Murtaugh 1941–1951
- Matt Murton 2005–2009
- Tony Muser 1969–1978
- Harrison Musgrave 2018–2019
- Dennis Musgraves 1965–1965
- Joe Musgrove 2016–2024
- Parker Mushinski 2022–2024
- Stan Musial 1941–1963
- Jeff Musselman 1986–1990
- Ron Musselman 1982–1985
- Danny Musser 1932–1932
- Neal Musser 2007–2008
- Paul Musser 1912–1919
- Barney Mussill 1944–1944
- Mike Mussina 1991–2008
- Alex Mustaikis 1940–1940
- Jeff Mutis 1991–1994
- Simon Muzziotti 2022–2022
- José Muñoz 1905–1911
- Roddery Muñoz 2024–2025
- Rolddy Muñoz 2025–2025
- George Myatt 1938–1947
- Glenn Myatt 1920–1936
- Buddy Myer 1925–1941
- Al Myers 1884–1891
- Bert Myers 1896–1900
- Bill Myers 1908–1910
- Billy Myers 1935–1941
- Brett Myers 2002–2013
- Dane Myers 2023–2025
- Elmer Myers 1915–1922
- George Myers 1884–1889
- Greg Myers 1987–2005
- Hap Myers 1910–1915
- Henry Myers 1881–1884
- Hi Myers 1909–1925
- Jimmy Myers 1996–1996
- Joseph Myers 1905–1905
- Lynn Myers 1938–1939
- Mike Myers 1995–2007
- Randy Myers 1985–1998
- Richie Myers 1956–1956
- Rod Myers 1996–1997
- Rodney Myers 1996–2004
- Tobias Myers 2024–2025
- Wil Myers 2013–2023
- Aaron Myette 1999–2004
- Bob Myrick 1976–1978
- Brian Myrow 2005–2008
- Luis Márquez 1946–1954
- José Méndez 1908–1926
- Johnny Vander Meer 1937–1951
- Roland de la Maza 1997–1997