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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Malulani Anakone# | 2.14 | 2025-2028 | |
| 2 | Manuel Sánchez# | 2.29 | 2026-2028 | |
| 3 | Kas Groen# | 2.43 | 2023-2026 | |
| 4 | Fernando Elías# | 2.50 | 2024-2028 | |
| 5 | Carlos Ortega | 2.69 | 2022-2026 | |
| 6 | Rob Ford# | 2.76 | 2026-2030 | |
| 7 | Vitorio Méndez | 2.79 | 2020-2025 | |
| 8 | Luis Arreola# | 2.82 | 2024-2027 | |
| 9 | Felipe Becerra | 2.83 | 2021-2025 | |
| 10 | Alberto Reyes# | 2.85 | 2020-2024 | |
| 11 | Sacco Brouwers# | 2.86 | 2022-2024 | |
| 12 | Ash Ibarra# | 2.88 | 2022-2024 | |
| 13 | William Fothergill# | 2.91 | 2028-2029 | |
| 14 | Xavier Padilla# | 3.06 | 2021-2024 | |
| 15 | Masahiro Sakei# | 3.07 | 2028-2029 | |
| 16 | José Pueblo# | 3.08 | 2026-2028 | |
| 17 | Rich Choquette# | 3.12 | 2028-2030 | |
| 18 | Leoncio Ulibarri# | 3.13 | 2023-2028 | |
| 19 | Gob Bluth# | 3.30 | 2024-2028 | |
| 20 | John Orton# | 3.38 | 2022-2025 | |
| 21 | Jeff Greer# | 3.56 | 2026-2029 | |
| 22 | Reid Garrett# | 3.57 | 2023-2026 | |
| 23 | Tomás Vargas# | 3.59 | 2023-2025 | |
| 24 | Horacio Pérez | 3.84 | 2020-2023 | |
| 24 | Ricardo Ramírez# | 3.84 | 2021-2025 | |
| 26 | Dave Seals# | 3.90 | 2023-2024 | |
| 27 | Baker Mayfield# | 4.03 | 2025-2026 | |
| 28 | Steve Costlow# | 4.09 | 2028-2029 | |
| 29 | Cheh Hao | 4.26 | 2024-2025 | |
| 30 | Mario Gonzáles# | 4.39 | 2022-2024 | |
| 31 | Bill Beauregard | 4.64 | 2020-2023 | |
| 32 | Alfredo Sánchez | 6.03 | 2020-2022 |
