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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | James Sprader# | .4138 | 1958 | |
| 2 | Dan Cole# | .4134 | 1957 | |
| 3 | Tim Pond# | .4073 | 1956 | |
| 4 | Souhei Takahashi# | .3973 | 1952 | |
| 5 | Federico Calderon# | .3869 | 1956 | |
| 6 | Santeri Saarikoski# | .3819 | 1955 | |
| 7 | Jonathan Gautier# | .3754 | 1958 | |
| 8 | Santeri Saarikoski# | .3736 | 1956 | |
| 9 | Tony Castaneda# | .3732 | 1957 | |
| 10 | Brian Nistler# | .3715 | 1954 | |
| 11 | Taylor Gray | .3651 | 1953 | |
| 12 | Chris Sullivan# | .3612 | 1955 | |
| 13 | Santeri Saarikoski# | .3556 | 1954 | |
| 14 | Maurice Château# | .3515 | 1955 | |
| 15 | Danny Cisneros# | .3498 | 1958 | |
| 16 | Robby Fritz# | .3489 | 1953 | |
| 17 | Zülfü Hocazâde# | .3475 | 1952 | |
| 18 | Danny Cisneros# | .3430 | 1954 | |
| 19 | Romain Larue# | .3375 | 1952 | |
| 20 | Robby Fritz# | .3284 | 1954 |
