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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Keith Rokosz# | .3946 | 1981 | |
| 2 | Anthony Veith# | .3845 | 1981 | |
| 3 | George Hendrick# | .3812 | 1968 | |
| 4 | Jose Aguirre# | .3807 | 1981 | |
| 5 | Tim Knight# | .3378 | 1981 | |
| 6 | Alex Duarte# | .2861 | 1981 |
