Single-Season wOBA (era-correct weights)

Coverage: play-by-play 1910–2025; earlier careers are incomplete

Weighted on-base average computed with each season's own linear weights, derived from play-by-play run expectancy — a home run in 1968 is worth more than one in 1930.

#	Player	Season	wOBA
1	Babe Ruth	1920	0.5884
2	Babe Ruth	1921	0.5704
3	Babe Ruth	1923	0.5665
4	Ted Williams	1941	0.5632
5	Babe Ruth	1926	0.5452
6	Babe Ruth	1924	0.5435
7	Barry Bonds	2002	0.5434
8	Babe Ruth	1927	0.5369
9	Barry Bonds	2001	0.5354
10	Rogers Hornsby	1925	0.5347
11	Rogers Hornsby	1924	0.5334
12	Lou Gehrig	1927	0.5325
13	Ted Williams	1957	0.5243
14	Ted Williams	1946	0.5213
15	Ted Williams	1942	0.5185
16	Babe Ruth	1931	0.5183
17	Jimmie Foxx	1932	0.5178
18	Babe Ruth	1930	0.5152
19	Rogers Hornsby	1922	0.5146
20	Ted Williams	1949	0.5082
21	Babe Ruth	1928	0.5057
22	Babe Ruth	1919	0.5057
23	Stan Musial	1948	0.5053
24	Lou Gehrig	1936	0.5048
25	Lou Gehrig	1934	0.5039
26	Rogers Hornsby	1928	0.5036
27	Ted Williams	1947	0.5034
28	Lou Gehrig	1930	0.5033
29	Jimmie Foxx	1938	0.5029
30	Jimmie Foxx	1933	0.5021
33	Babe Ruth	1932	0.5006
32	Jimmie Foxx	1939	0.5006
31	Ted Williams	1948	0.5006
34	Ty Cobb	1911	0.5004
35	Harry Heilmann	1923	0.4998
36	Mickey Mantle	1957	0.4989
37	Mickey Mantle	1956	0.4977
38	Rogers Hornsby	1929	0.4947
39	Hack Wilson	1930	0.4933
40	Lou Gehrig	1928	0.4926
41	Mark McGwire	1998	0.4924
42	Harry Heilmann	1927	0.4904
43	Shoeless Joe Jackson	1911	0.4903
44	Arky Vaughan	1935	0.4902
45	Lou Gehrig	1937	0.4901
46	George Sisler	1920	0.4894
47	Joe DiMaggio	1939	0.4889
48	Norm Cash	1961	0.4886
49	Jeff Bagwell	1994	0.4882
50	Mark McGwire	1996	0.4881