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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Steve Kleinberg | .3841 | 1952-1956 | |
| 2 | Arman Igumentsev# | .3738 | 1952-1954 | |
| 3 | Takeichi Tamura | .3694 | 1952-1955 | |
| 4 | Haruyoshi Chikasuye# | .3689 | 1952-1954 | |
| 5 | Bosko Racic# | .3629 | 1952-1955 |
