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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Matthew Kilpatrick | 2.325 | 2030-2034 | |
| 2 | Tim Parks | 2.421 | 2026-2031 | |
| 3 | Bruce Callahan | 2.432 | 2031-2036 | |
| 4 | Juan Mota | 2.521 | 2028-2034 | |
| 5 | Alejandro Amaya | 2.679 | 2027-2031 | |
| 6 | Roberto Pérez# | 3.071 | 2059-2064 | |
| 7 | Tom Campbell# | 3.406 | 2055-2061 | |
| 8 | Alonso Orozco# | 3.898 | 2055-2060 | |
| 9 | William Boswell# | 4.552 | 2051-2059 |
