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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ryan Ingram | 3.04 | 2023-2027 | |
| 2 | Carlos Díaz# | 3.10 | 2022-2028 | |
| 3 | Xavier Padilla# | 3.40 | 2025-2028 | |
| 4 | Fernando Durán# | 3.46 | 2023-2026 | |
| 5 | Zane Reed# | 3.51 | 2017-2028 | |
| 6 | Fernando Reyna# | 3.54 | 2015-2027 | |
| 7 | Víctor García# | 3.55 | 2017-2021 | |
| 7 | Tomiji Saikawa# | 3.55 | 2023-2028 | |
| 9 | Horace McKenzie# | 3.57 | 2016-2021 | |
| 10 | Miguel Mora | 3.80 | 2015-2020 | |
| 11 | Xavier Navarro# | 3.93 | 2023-2026 | |
| 12 | Jorge Velázquez | 3.94 | 2017-2025 | |
| 13 | Bob Payne# | 3.95 | 2025-2027 | |
| 14 | Miguel González | 3.96 | 2015-2018 | |
| 15 | Raúl Pérez# | 3.98 | 2015-2028 | |
| 16 | Jeremy Petty | 4.12 | 2018-2023 | |
| 17 | Il-gyung Kim | 4.19 | 2017-2026 | |
| 18 | Gustavo Pérez# | 4.23 | 2018-2024 | |
| 19 | Javier Penela | 4.24 | 2015-2020 | |
| 20 | Júlio Hernández | 4.37 | 2015-2019 | |
| 21 | Ipe Talboom# | 4.45 | 2024-2028 | |
| 22 | Jeff Moore | 4.66 | 2015-2017 | |
| 23 | Romano Martínez# | 4.82 | 2024-2028 | |
| 24 | Ernest Gunter | 4.85 | 2015-2024 | |
| 25 | Kenny Ryan | 4.93 | 2020-2024 | |
| 26 | John Tanner | 4.99 | 2015-2019 | |
| 27 | Elroy Gardner | 5.03 | 2015-2019 | |
| 28 | Jeremy de Vos# | 5.07 | 2022-2025 | |
| 29 | Juan Núñez | 5.15 | 2015-2018 |
