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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Carlos Díaz# | 3.10 | 2022-2028 | |
| 2 | Xavier Padilla# | 3.32 | 2025-2030 | |
| 3 | Zane Reed# | 3.51 | 2017-2028 | |
| 4 | Fernando Reyna | 3.54 | 2015-2027 | |
| 5 | Víctor García# | 3.55 | 2017-2021 | |
| 5 | Tomiji Saikawa | 3.55 | 2023-2028 | |
| 7 | Horace McKenzie# | 3.57 | 2016-2021 | |
| 8 | Miguel Mora | 3.80 | 2015-2020 | |
| 9 | Bob Payne# | 3.95 | 2025-2027 | |
| 10 | Miguel González | 3.96 | 2015-2018 | |
| 11 | Raúl Pérez | 3.98 | 2015-2028 | |
| 12 | Currito Melena# | 4.06 | 2025-2030 | |
| 13 | Il-gyung Kim | 4.19 | 2017-2026 | |
| 14 | Plinio Pedrulho# | 4.20 | 2020-2030 | |
| 15 | Gustavo Pérez# | 4.23 | 2018-2024 | |
| 16 | Javier Penela | 4.24 | 2015-2020 | |
| 17 | Júlio Hernández | 4.37 | 2015-2019 | |
| 18 | Ipe Talboom# | 4.45 | 2024-2028 | |
| 19 | Romano Martínez# | 4.74 | 2024-2029 | |
| 20 | Jeremy de Vos# | 5.07 | 2022-2025 | |
| 21 | Juan Núñez | 5.15 | 2015-2018 |
