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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Henry Mann | 1.078 | 2025-2032 | |
| 2 | Steve Jones | 1.066 | 2023-2030 | |
| 3 | Francisco Ortega | 1.040 | 2020-2029 | |
| 4 | Manny Maltby | 1.005 | 2029-2032 | |
| 5 | Rafael Barrueco | 0.987 | 2038-2042 | |
| 6 | Jackson Curry | 0.984 | 2034-2039 | |
| 7 | Román Ramos | 0.957 | 2046-2052 | |
| 8 | Alfredo Pliego# | 0.945 | 2043-2051 | |
| 9 | Robby Arnold | 0.927 | 2031-2038 |
