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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Chris Mullins | .4768 | 1964-1969 | |
| 2 | Leo Vigar | .4001 | 1958-1963 | |
| 3 | Ricardo Márquez | .3956 | 1978-1985 | |
| 4 | Ken Jones | .3721 | 1964-1969 | |
| 5 | Myung-hwan Kim# | .3440 | 1975-1988 | |
| 6 | Feng Tann# | .3433 | 1984-1991 | |
| 7 | Patrick Smith | .3380 | 1956-1967 | |
| 8 | Manny Garza | .3375 | 1911-1916 | |
| 9 | Augusto Rodríguez | .3036 | 1957-1961 |
