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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Isaiah Campbell# | 2.255 | 2021 | |
| 2 | Ignacio Feliz# | 2.712 | 2022 | |
| 3 | Robert Dominguez# | 3.245 | 2021 | |
| 4 | Eric Pardinho# | 3.256 | 2021 | |
| 5 | Antonio Santos# | 3.410 | 2023 | |
| 6 | Owen Murphy# | 3.921 | 2023 | |
| 7 | Andry Lara# | 4.673 | 2023 | |
| 8 | Brennan Malone# | 4.709 | 2021 | |
| 9 | Eddy Yean# | 4.724 | 2022 | |
| 10 | Denny Larrondo# | 4.731 | 2022 | |
| 11 | Seth Johnson# | 4.967 | 2021 | |
| 12 | Andry Lara# | 4.972 | 2022 |
