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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Katsuhiko Jouda | .578 | 2021-2033 | |
| 2 | John Grondin* | .551 | 2013-2028 | |
| 3 | Norman Kuhn# | .535 | 2021-2035 | |
| 4 | Timothy Palacio | .503 | 2007-2021 | |
| 5 | Gene Reynolds | .501 | 2020-2032 | |
| 6 | Thomas Lyons# | .463 | 2025-2035 | |
| 7 | José Vega# | .418 | 2027-2035 | |
| 8 | Enrique González# | .407 | 2026-2035 | |
| 9 | Jesús Álvarez | .404 | 2022-2031 | |
| 9 | Timothy Mendiola | .404 | 2012-2026 | |
| 11 | Billy Cremeans | .398 | 2015-2023 | |
| 12 | Ieyasu Suzuki | .385 | 2026-2033 | |
| 13 | Roberto Ferrer | .383 | 2013-2024 |
