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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Billy Dotson | .5089 | 2030-2044 | |
| 2 | Ray Sears* | .5015 | 2013-2028 | |
| 3 | Ryder Ringor | .4946 | 2037-2051 | |
| 4 | Seung-jae Kyong | .4887 | 2043-2058 | |
| 5 | Melvin Thomas | .4803 | 2035-2051 | |
| 6 | Basilio Penni# | .4792 | 2050-2060 | |
| 7 | António Macías | .4707 | 2040-2058 | |
| 8 | Chris P. Bacon | .4682 | 2044-2055 | |
| 9 | Bob Campbell | .4673 | 2014-2025 | |
| 10 | Hugh Mungus | .4606 | 2027-2044 | |
| 11 | António Martínez* | .4539 | 2024-2037 | |
| 12 | Herman Hayes | .4532 | 2015-2029 | |
| 13 | Carlos Rivera# | .4517 | 2045-2060 | |
| 14 | Dan Wells# | .4442 | 2048-2059 | |
| 15 | Nate Cates | .4308 | 2016-2028 | |
| 16 | David Edwards | .4196 | 2019-2035 | |
| 17 | Tamasaburo Kato* | .4119 | 2021-2037 | |
| 18 | Arturo Rodríguez | .4096 | 2026-2038 | |
| 19 | Kawenaula Alohalani | .4012 | 2041-2054 | |
| 20 | Guillermo Coss | .4010 | 2029-2045 | |
| 21 | Lautaro Lacasa | .3993 | 2042-2059 | |
| 22 | Zhong-yi Yun | .3981 | 2047-2059 | |
| 23 | Ed Hopkins | .3876 | 2018-2027 | |
| 24 | Sake van Arem* | .3853 | 2023-2041 | |
| 25 | Gabriel Rodríguez | .3794 | 2018-2029 | |
| 26 | Bartolo Morales | .3672 | 2022-2038 |
