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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 | Chris P. Bacon# | .3752 | 2044-2054 | |
| 4 | Seung-jae Kyong# | .3707 | 2043-2054 | |
| 5 | Sake van Arem* | .3541 | 2023-2041 | |
| 6 | Carlos Rivera# | .3519 | 2045-2054 | |
| 7 | Bob Campbell | .3496 | 2014-2025 | |
| 8 | Melvin Thomas | .3494 | 2035-2051 | |
| 9 | Ray Sears* | .3490 | 2013-2028 | |
| 10 | David Edwards | .3458 | 2019-2035 | |
| 11 | Arturo Rodríguez | .3422 | 2026-2038 | |
| 12 | Ryder Ringor | .3401 | 2037-2051 | |
| 13 | Herman Hayes | .3391 | 2015-2029 | |
| 14 | António Macías# | .3312 | 2040-2054 | |
| 15 | Nate Cates | .3303 | 2016-2028 | |
| 16 | Lautaro Lacasa# | .3301 | 2042-2054 | |
| 17 | Guillermo Coss | .3225 | 2029-2045 | |
| 18 | Billy Dotson | .3222 | 2030-2044 | |
| 19 | Hugh Mungus | .3210 | 2027-2044 | |
| 20 | Bartolo Morales | .3139 | 2022-2038 | |
| 21 | Ed Hopkins | .3115 | 2018-2027 | |
| 22 | Kawenaula Alohalani# | .2979 | 2041-2054 | |
| 23 | Gabriel Rodríguez | .2758 | 2018-2029 |
