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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | John Farrell | 1.090 | 2016-2022 | |
| 2 | Gabriel Pérez# | 1.078 | 2023-2028 | |
| 3 | Jon Osterman# | 1.066 | 2028-2032 | |
| 4 | David Henderson | 1.039 | 2016-2025 | |
| 5 | Ramón Rivera# | 1.033 | 2023-2028 | |
| 6 | Jay Parker# | 1.032 | 2024-2028 | |
| 7 | Jack MacAsgill# | 1.031 | 2023-2029 | |
| 8 | Manuel García | 1.015 | 2014-2021 | |
| 9 | Cale Sutton | 1.014 | 2015-2031 | |
| 10 | Count Dante# | 1.010 | 2025-2032 | |
| 11 | Ramiro Salazar | 1.009 | 2016-2027 | |
| 12 | Gregg Wagner | 1.005 | 2019-2028 | |
| 12 | Nobuo Yamashita# | 1.005 | 2025-2032 | |
| 14 | Tommy Jones# | .994 | 2015-2030 | |
| 14 | Chris West | .994 | 2020-2027 | |
| 16 | Luis Ríos# | .980 | 2027-2031 | |
| 17 | Julián Salcido# | .971 | 2027-2032 | |
| 18 | António Pérez# | .967 | 2021-2032 | |
| 19 | José Ramírez | .965 | 2015-2019 |
