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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | John Cotton# | .7609 | 2026-2026 | |
| 2 | Craig Kelley# | .5714 | 2026-2026 | |
| 3 | Willie Alvarez# | .5263 | 2025-2026 | |
| 4 | Bubba Austin# | .4783 | 2025-2026 | |
| 5 | Oscar Juarez# | .4717 | 2025-2026 | |
| 6 | Mark Crawford# | .4510 | 2026-2026 | |
| 7 | Julio Negron# | .4359 | 2020-2026 | |
| 8 | Rob Beall# | .4308 | 2026-2026 | |
| 9 | Chris Malay# | .4098 | 2026-2026 | |
| 10 | Eric Barrett# | .3824 | 2022-2026 | |
| 11 | Art MacDonald# | .3816 | 2021-2026 | |
| 12 | Dan Price# | .3784 | 2026-2026 | |
| 13 | Jon Olejniczak# | .3699 | 2023-2026 | |
| 14 | Pete Horne# | .3529 | 2022-2026 | |
| 15 | Regis Roper# | .3500 | 2021-2026 | |
| 16 | Kevin Davis# | .3175 | 2022-2026 | |
| 17 | George Hutchison# | .3165 | 2024-2026 | |
| 18 | Cesar Mena# | .3103 | 2025-2026 | |
| 19 | Joe Greer# | .2879 | 2025-2026 | |
| 20 | Rich Cloutier# | .2794 | 2020-2026 | |
| 21 | Johnny Pullam# | .2727 | 2020-2026 | |
| 22 | Mike Johnson# | .2632 | 2023-2026 | |
| 23 | Matt Bellavance# | .2623 | 2025-2026 | |
| 23 | Mike Bolden# | .2623 | 2026-2026 | |
| 25 | Justin Dawson# | .2258 | 2026-2026 | |
| 26 | Jake Hoffmann# | .2174 | 2025-2026 | |
| 27 | Willie Bazaldua# | .1667 | 2015-2026 | |
| 28 | Joe Morrison# | .1628 | 2026-2026 | |
| 29 | Humberto Castano# | .1429 | 2020-2026 | |
| 30 | Cameron Witt# | .1395 | 2017-2026 |
