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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Martin White | 4.107 | 2022-2028 | |
| 2 | Manny Maldonado | 4.216 | 2014-2025 | |
| 3 | Máximo Marín | 4.434 | 2022-2027 | |
| 4 | Ramón Fonseca | 4.743 | 2021-2027 | |
| 5 | Ron Chapman | 5.522 | 2021-2027 | |
| 6 | Ernesto Mendoza | 5.552 | 2026-2034 | |
| 7 | Teddy Peters# | 5.572 | 2043-2049 | |
| 8 | Lou Snyder# | 6.431 | 2039-2048 |
