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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jussi Koivurinne# | .3925 | 1979-1982 | |
| 2 | Pyotr Shlapunov# | .3814 | 1981-1984 | |
| 3 | Connor Hempsall# | .3554 | 1972-1975 | |
| 4 | Jude Smyth# | .3378 | 1978-1981 |
