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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 | 2025-2033 | |
| 2 | Dan Holliday | 1.047 | 2016-2024 | |
| 3 | Gilbert Graham# | 1.037 | 2024-2030 | |
| 4 | José Vázquez# | 1.034 | 2028-2030 | |
| 5 | Pedro Rivera# | 1.021 | 2025-2028 | |
| 6 | Iemitsu Hatsutori# | .997 | 2028-2032 | |
| 7 | Mike Cook | .959 | 2023-2030 | |
| 8 | Jesús Soto# | .931 | 2021-2032 |
