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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Alejandro Ramos | 2.42 | 2021-2025 | |
| 2 | Bob Browning# | 2.58 | 2023-2025 | |
| 3 | Ismael Lara# | 2.70 | 2024-2027 | |
| 4 | Armando Ortíz | 2.71 | 2021-2025 | |
| 5 | José López# | 3.00 | 2026-2028 | |
| 6 | Edward Scarborough# | 3.23 | 2026-2029 | |
| 7 | Pedro Adame# | 3.50 | 2026-2028 | |
| 8 | Zach Pinyerrel# | 3.76 | 2029-2034 | |
| 9 | Felipe Pereira# | 4.12 | 2024-2027 | |
| 10 | Carl MacPherson# | 4.15 | 2031-2034 | |
| 11 | Phillip Donoghue# | 4.18 | 2029-2033 | |
| 12 | Kent Horton# | 4.26 | 2030-2032 |
