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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Josh Donaldson | 1.069 | 2010-2014 | |
| 2 | Geoff Hughes | 1.048 | 2000-2009 | |
| 3 | Geun-pyo Kim# | 1.036 | 2022-2026 | |
| 3 | Ed Robinson | 1.036 | 2008-2013 | |
| 5 | Mario Márquez# | 1.017 | 2022-2025 | |
| 6 | Miguel Borrayo# | 1.010 | 2022-2025 | |
| 7 | Marc Nelson# | 1.003 | 2021-2024 | |
| 7 | Gary Scott | 1.003 | 1991-2002 | |
| 9 | Alec Allison# | 0.997 | 2019-2022 |
