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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Mario Nieves | 1.119 | 2025-2038 | |
| 2 | Dan Holliday | 1.047 | 2016-2024 | |
| 3 | John Hansen# | 1.043 | 2035-2038 | |
| 4 | Gilbert Graham | 1.037 | 2024-2030 | |
| 5 | José Vázquez | 1.034 | 2028-2030 | |
| 6 | Pedro Rivera | 1.021 | 2025-2028 | |
| 7 | Iemitsu Hatsutori | .997 | 2028-2038 | |
| 8 | Ieyoshi Samurakami# | .976 | 2032-2035 | |
| 9 | Jesús Soto | .931 | 2021-2032 |
