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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | António Martínez* | .3852 | 2024-2037 | |
| 2 | Tamasaburo Kato | .3849 | 2021-2037 | |
| 3 | Sake van Arem | .3541 | 2023-2041 | |
| 4 | Bob Campbell | .3496 | 2014-2025 | |
| 5 | Ray Sears* | .3490 | 2013-2028 | |
| 6 | David Edwards | .3458 | 2019-2035 | |
| 7 | Arturo Rodríguez | .3422 | 2026-2038 | |
| 8 | Herman Hayes | .3391 | 2015-2029 | |
| 9 | Nate Cates | .3303 | 2016-2028 | |
| 10 | Guillermo Coss# | .3225 | 2029-2044 | |
| 11 | Billy Dotson# | .3222 | 2030-2044 | |
| 12 | Hugh Mungus | .3210 | 2027-2044 | |
| 13 | Bartolo Morales | .3139 | 2022-2038 | |
| 14 | Ed Hopkins | .3115 | 2018-2027 | |
| 15 | Gabriel Rodríguez | .2758 | 2018-2029 |
