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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | António Hernández# | .3737 | 1979-1990 | |
| 2 | Luis Maldonado | .3372 | 1958-1968 | |
| 3 | Tom Leger# | .3276 | 1982-1990 | |
| 4 | Juan Longoria | .3194 | 1975-1988 | |
| 5 | Juan Mora | .3182 | 1923-1935 |
