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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OSLG | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Luis Mora# | .3049 | 2019 | |
| 2 | John Brown# | .3465 | 2019 | |
| 3 | Jayden Williams# | .3494 | 2019 | |
| 4 | Pat Burkholder# | .3582 | 2019 | |
| 5 | Brad Williamson# | .3871 | 2019 | |
| 6 | Chris Hipp# | .4507 | 2019 | |
| 7 | Charlie Hunter# | .4583 | 2019 | |
| 8 | Bill Frazer# | .4848 | 2019 | |
| 9 | Marv Millard# | .5000 | 2019 | |
| 10 | Kyle Farewell# | .5077 | 2019 | |
| 11 | Adam Obermeier# | .5109 | 2019 |
