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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Fernando Vazquez# | .4297 | 1981 | |
| 2 | Tony Conigliaro# | .4095 | 1963 | |
| 3 | Melvin Williams# | .3640 | 1981 | |
| 4 | Ed Amelung# | .3553 | 1981 | |
| 5 | Juan Blanco# | .3287 | 1981 | |
| 6 | Bruce Stocker# | .3137 | 1981 | |
| 7 | Jose Mota# | .3083 | 1981 | |
| 8 | Ronald Cashore# | .2743 | 1981 | |
| 9 | Paul Lesieur# | .2703 | 1981 | |
| 10 | James Moriarty# | .2085 | 1981 |
