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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Clay Burns# | 1.037 | 2025-2034 | |
| 2 | Esteban García | 1.019 | 2022-2029 | |
| 3 | Germán Velásquez | 1.015 | 2021-2026 | |
| 4 | Casimiro Levasseur | 1.012 | 2021-2030 | |
| 5 | Steffen Stingley | .998 | 2015-2022 | |
| 6 | Bobby Krieger | .990 | 2019-2032 | |
| 7 | Chet Brown# | .989 | 2022-2034 | |
| 8 | Anthony Powers# | .984 | 2025-2035 | |
| 9 | Chad Weaver | .981 | 2023-2032 | |
| 10 | Darryl Smith | .980 | 2019-2025 | |
| 10 | Chi-young Zhào | .980 | 2019-2025 | |
| 12 | George Byrne | .975 | 2013-2021 | |
| 13 | Dale Rice# | .968 | 2026-2035 | |
| 14 | Juan Dávila# | .963 | 2028-2035 | |
| 15 | Brenton Ross# | .887 | 2027-2033 | |
| 16 | Gregory Graham | .777 | 2014-2022 | |
| 17 | Robert Nichols | .000 | 2013-2019 |
