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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Alaric Hamann# | .4695 | 1972-1989 | |
| 2 | Doug Cooper* | .4355 | 1912-1927 | |
| 3 | Wendell Lane | .4191 | 1935-1939 | |
| 4 | Jesús López | .3977 | 1940-1949 | |
| 5 | Reece MacKinley | .3917 | 1930-1948 | |
| 6 | Rich Angwin* | .3903 | 1920-1936 | |
| 7 | Bill O'Flaherty | .3894 | 1943-1956 | |
| 7 | Quentin Gresham | .3894 | 1914-1923 | |
| 9 | Frode Bomas* | .3884 | 1955-1972 | |
| 10 | David Luciani | .3870 | 1947-1963 | |
| 11 | Bob Beauchamp | .3839 | 1911-1922 | |
| 12 | Ĺge Zinck | .3802 | 1960-1969 | |
| 13 | Guillermo Gallegos | .3789 | 1912-1926 | |
| 14 | Kuan-yew Da | .3785 | 1932-1941 | |
| 15 | Mario Maldonado | .3731 | 1922-1928 | |
| 16 | Tierney Dubber | .3720 | 1953-1961 | |
| 17 | Alfie Madocks | .3717 | 1936-1944 | |
| 18 | Louis Cooper | .3656 | 1911-1917 | |
| 19 | Gareth Gyte# | .3655 | 1983-1990 | |
| 20 | Bartolo Rosado | .3600 | 1972-1984 | |
| 21 | Greg Hickman | .3587 | 1911-1917 | |
| 22 | Jon Greenhalgh | .3556 | 1911-1916 | |
| 23 | Apela Kahukiwa | .3553 | 1927-1938 | |
| 24 | Dylan Bothwick | .3533 | 1922-1932 | |
| 25 | Jesús Acuńa# | .3532 | 1979-1990 | |
| 26 | Kalema Rifaa# | .3522 | 1986-1990 | |
| 27 | Kahil Ya'qub | .3513 | 1973-1989 | |
| 28 | Morgan Meriken | .3482 | 1935-1951 | |
| 29 | Rubén Pérez | .3477 | 1969-1983 | |
| 30 | Trevor Boisseau | .3469 | 1944-1956 | |
| 31 | Nino Giammarttini | .3441 | 1958-1967 | |
| 32 | Alan Ewbank* | .3437 | 1944-1959 | |
| 33 | Padraig Padgett | .3431 | 1924-1934 | |
| 34 | Frode Adriaens | .3402 | 1952-1964 | |
| 35 | Voitto Toikka* | .3401 | 1951-1966 | |
| 35 | Dave Mallandain | .3401 | 1956-1966 | |
| 37 | Mitchell Brisley | .3381 | 1956-1967 | |
| 38 | Judite Morra | .3373 | 1939-1948 | |
| 39 | Eisaku Chouda | .3369 | 1939-1946 | |
| 40 | Rich West | .3363 | 1943-1951 | |
| 41 | José Herrera | .3357 | 1919-1933 | |
| 42 | Sigifrid Hentsch | .3311 | 1930-1947 | |
| 43 | Matthew Iddon | .3179 | 1964-1972 | |
| 44 | Cheng-hao Xia | .3160 | 1914-1921 |
