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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 | Mike Johnstone | 1.056 | 2041-2050 | |
| 3 | Scott Ramsey | 1.050 | 2034-2040 | |
| 4 | Dan Holliday | 1.047 | 2016-2024 | |
| 5 | John Hansen | 1.043 | 2035-2039 | |
| 6 | Gilbert Graham | 1.037 | 2024-2030 | |
| 7 | Cristóbal Calzacorta# | 1.036 | 2046-2048 | |
| 8 | José Vázquez | 1.034 | 2028-2030 | |
| 9 | Tom Rollins# | 1.033 | 2050-2053 | |
| 10 | Pedro Rivera | 1.021 | 2025-2028 | |
| 11 | Dave Johns# | 1.017 | 2046-2055 | |
| 12 | Iemitsu Hatsutori | 0.997 | 2028-2038 | |
| 13 | Ieyoshi Samurakami | 0.976 | 2032-2035 | |
| 14 | Jesús Soto | 0.931 | 2021-2032 |
