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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Matthew Brown# | .4121 | 1957-1959 | |
| 2 | Bobby Ziomek | .4020 | 1952-1954 | |
| 3 | Tomoaki Nakamura# | .4004 | 1952-1955 | |
| 4 | Yutaka Harada# | .3978 | 1956-1959 | |
| 5 | Jim Walchak | .3825 | 1952-1954 | |
| 6 | Mario van Dinteren# | .3736 | 1955-1959 | |
| 7 | Pedro Flores# | .3261 | 1952-1955 |
