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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Marcos Chávez | 1.019 | 2020-2027 | |
| 2 | Kenny Snider | 1.012 | 2018-2024 | |
| 3 | Mauro Sánchez# | 1.003 | 2029-2035 | |
| 4 | Alonso Barrenechea | .982 | 2015-2026 | |
| 5 | Ramón Contreras# | .980 | 2030-2035 | |
| 6 | Leo Torre | .950 | 2016-2028 | |
| 7 | Greg Wharton | .000 | 2015-2019 |
