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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ray Sears* | .501 | 2013-2028 | |
| 2 | Billy Dotson# | .477 | 2030-2037 | |
| 3 | Hugh Mungus# | .469 | 2027-2037 | |
| 4 | Bob Campbell | .467 | 2014-2025 | |
| 5 | António Martínez# | .454 | 2024-2037 | |
| 6 | Herman Hayes | .438 | 2015-2029 | |
| 7 | Juan Jose Ayala# | .431 | 2025-2037 | |
| 7 | Nate Cates | .431 | 2016-2028 | |
| 9 | David Edwards | .418 | 2019-2035 | |
| 10 | Tamasaburo Kato# | .412 | 2021-2037 | |
| 11 | Arturo Rodríguez# | .410 | 2026-2036 | |
| 12 | Ed Hopkins | .388 | 2018-2027 | |
| 13 | Sake van Arem# | .385 | 2023-2037 | |
| 14 | Gabriel Rodríguez | .379 | 2018-2029 | |
| 15 | Bartolo Morales# | .367 | 2022-2036 |
