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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 | Bob Campbell | .4673 | 2014-2025 | |
| 4 | Hugh Mungus | .4606 | 2027-2044 | |
| 5 | António Martínez* | .4539 | 2024-2037 | |
| 6 | Herman Hayes | .4532 | 2015-2029 | |
| 7 | Nate Cates | .4308 | 2016-2028 | |
| 8 | David Edwards | .4196 | 2019-2035 | |
| 9 | Tamasaburo Kato | .4119 | 2021-2037 | |
| 10 | Arturo Rodríguez | .4096 | 2026-2038 | |
| 11 | Guillermo Coss# | .4010 | 2029-2044 | |
| 12 | Ed Hopkins | .3876 | 2018-2027 | |
| 13 | Sake van Arem | .3853 | 2023-2041 | |
| 14 | Gabriel Rodríguez | .3794 | 2018-2029 | |
| 15 | Bartolo Morales | .3672 | 2022-2038 |
