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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OPS | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Seung-jae Kyong | .8512 | 2043-2058 | |
| 2 | Ray Sears* | .8505 | 2013-2028 | |
| 3 | Chris P. Bacon | .8438 | 2044-2055 | |
| 4 | António Martínez* | .8392 | 2024-2037 | |
| 5 | Ryder Ringor | .8347 | 2037-2051 | |
| 6 | Billy Dotson | .8311 | 2030-2044 | |
| 7 | Melvin Thomas | .8297 | 2035-2051 | |
| 8 | Basilio Penni# | .8256 | 2050-2060 | |
| 9 | Bob Campbell | .8169 | 2014-2025 | |
| 10 | António Macías | .8038 | 2040-2058 | |
| 11 | Carlos Rivera# | .7980 | 2045-2060 | |
| 12 | Tamasaburo Kato* | .7967 | 2021-2037 | |
| 13 | Herman Hayes | .7922 | 2015-2029 | |
| 14 | Dan Wells# | .7826 | 2048-2059 | |
| 15 | Hugh Mungus | .7816 | 2027-2044 | |
| 16 | David Edwards | .7655 | 2019-2035 | |
| 17 | Nate Cates | .7611 | 2016-2028 | |
| 18 | Arturo Rodríguez | .7517 | 2026-2038 | |
| 19 | Zhong-yi Yun | .7456 | 2047-2059 | |
| 20 | Sake van Arem* | .7395 | 2023-2041 | |
| 21 | Lautaro Lacasa | .7256 | 2042-2059 | |
| 22 | Guillermo Coss | .7236 | 2029-2045 | |
| 23 | Kawenaula Alohalani | .6991 | 2041-2054 | |
| 24 | Ed Hopkins | .6990 | 2018-2027 | |
| 25 | Bartolo Morales | .6811 | 2022-2038 | |
| 26 | Gabriel Rodríguez | .6552 | 2018-2029 |
