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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Vincent Sturm | 2.895 | 2051-2059 | |
| 2 | Francisco Encarnación# | 2.963 | 2051-2059 | |
| 3 | Xavier Padilla | 3.316 | 2025-2031 | |
| 4 | Ricardo Fraga | 3.359 | 2030-2037 | |
| 5 | Teddy Barnes | 3.368 | 2049-2052 | |
| 6 | Rafael González | 3.425 | 2033-2039 | |
| 7 | Fernando Reyna | 3.545 | 2015-2027 | |
| 8 | Joaquín Pérez | 3.553 | 2033-2037 | |
| 9 | Fernando López# | 3.668 | 2057-2063 | |
| 10 | David Jordan# | 3.681 | 2055-2062 | |
| 11 | Miguel Mora | 3.802 | 2015-2020 | |
| 12 | José Santiago | 3.917 | 2028-2032 | |
| 13 | Raúl Pérez | 3.983 | 2015-2028 | |
| 14 | Il-gyung Kim | 4.189 | 2017-2026 | |
| 15 | Gerard Fyson | 4.543 | 2040-2045 | |
| 16 | Romano Martínez | 4.737 | 2024-2029 | |
| 17 | Mark Brunswick | 4.754 | 2042-2048 |
