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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Santiago González | 3.28 | 2017-2026 | |
| 2 | Nathan Seymour | 3.96 | 2020-2026 | |
| 3 | Gilberto Barrera | 4.79 | 2013-2019 | |
| 4 | Gildun Ouakili | 4.89 | 2011-2021 |
