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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OOBP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Neil Millirons | .2478 | 2038-2040 | |
| 2 | Jake Robinson | .2619 | 2017-2024 | |
| 3 | Willi Kehr | .2703 | 2026-2028 | |
| 4 | Robert Osborne | .2969 | 2014-2020 | |
| 5 | Blake Mastromarino | .2993 | 2045-2048 | |
| 6 | Felipe Arreola | .3057 | 2027-2028 | |
| 7 | Juan Martínez | .3098 | 2028-2029 | |
| 8 | John Haslam# | .3206 | 2057-2060 | |
| 9 | Victor Vicente# | .3245 | 2048-2053 | |
| 10 | Ánibal Altichioro | .3307 | 2024-2028 | |
| 11 | Steve Atkins# | .3381 | 2059-2060 | |
| 12 | Clay Tedesco# | .3503 | 2056-2058 | |
| 13 | Jim Shaffner | .3577 | 2039-2042 |
