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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Hae-nim Kim | .3916 | 1936-1942 | |
| 2 | José Rosales | .3861 | 1955-1960 | |
| 3 | António Pérez | .3840 | 1977-1987 | |
| 4 | Brian Thomas | .3441 | 1938-1944 | |
| 5 | Christian Joyce | .3384 | 1963-1972 | |
| 6 | Ramiro Reynoso# | .3359 | 1978-1990 | |
| 7 | John Law | .3315 | 1976-1983 | |
| 8 | Terry Wagner | .3115 | 1961-1965 | |
| 9 | Víctor Navarro | .2838 | 1959-1969 |
