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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Armando Ortíz | 2.71 | 2021-2025 | |
| 2 | Edward Scarborough | 3.23 | 2026-2029 | |
| 3 | Carl MacPherson# | 3.97 | 2031-2035 | |
| 4 | Phillip Donoghue# | 4.18 | 2029-2033 | |
| 5 | Kent Horton# | 4.26 | 2030-2032 |
