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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jose Ruiz# | .4610 | 2026 | |
| 2 | Steve Knappen# | .4344 | 2026 | |
| 3 | Doug Barber# | .4289 | 2026 | |
| 4 | Allen Bryant# | .4275 | 2026 | |
| 5 | Mike Den Boer# | .3828 | 2026 | |
| 6 | Billy Grafton# | .3723 | 2026 | |
| 7 | Jake McKenna# | .3556 | 2026 | |
| 8 | Oscar Hernandez# | .3503 | 2026 | |
| 9 | Bobby Van Gilder# | .3469 | 2026 | |
| 10 | Ki-heon Chon# | .3144 | 2026 | |
| 11 | Kurtis Young# | .2907 | 2026 |
