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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | David Morales | .480 | 2017-2023 | |
| 2 | Vincent Klein# | .420 | 2025-2030 | |
| 3 | Ken Miller | .402 | 2015-2025 | |
| 4 | Mike Peterson | .382 | 2016-2023 | |
| 4 | Gustavo Varela | .382 | 2017-2023 | |
| 6 | Steve Hinkle | .381 | 2015-2024 | |
| 7 | Mike Fleming | .374 | 2015-2025 | |
| 8 | Sal Haynes | .369 | 2015-2028 | |
| 9 | Steve Bock# | .356 | 2027-2030 | |
| 10 | Wessel Wemerman# | .355 | 2024-2029 | |
| 11 | Avery Little | .351 | 2015-2025 | |
| 11 | Tom Palmer | .351 | 2017-2026 | |
| 13 | Alfredo Chávez | .340 | 2021-2027 | |
| 14 | Francisco García# | .339 | 2018-2031 | |
| 15 | Bob Curry# | .334 | 2016-2025 | |
| 16 | José Caballero | .330 | 2015-2019 | |
| 17 | Mitchell Cusimano# | .329 | 2027-2030 | |
| 18 | Manuel Martínez | .317 | 2018-2025 | |
| 19 | Carlos Ramírez# | .307 | 2025-2031 | |
| 20 | Keith Alexander# | .302 | 2018-2030 |
