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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Tyler Poole | 1.045 | 2008-2013 | |
| 2 | Ben Holland | 1.037 | 2007-2009 | |
| 3 | Marcos Armas | 1.036 | 1993-2000 | |
| 4 | Román Córdova# | 1.022 | 2026-2030 | |
| 5 | Rusty Klein | 1.013 | 2010-2013 | |
| 6 | Iván López# | 1.012 | 2024-2028 | |
| 7 | Jorge Elejarza# | 1.006 | 2024-2028 |
