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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Gabriel Gutiérrez | 1.762 | 2011-2020 | |
| 2 | Xavier González | 1.808 | 2014-2036 | |
| 3 | José López | 2.331 | 2009-2018 | |
| 4 | José Santos | 2.381 | 2012-2026 | |
| 5 | Ángel Valdéz | 2.399 | 2017-2026 | |
| 6 | Javier Gómez | 2.411 | 2014-2025 | |
| 7 | Ron Gómez# | 2.584 | 2024-2041 | |
| 8 | Clark Vallés# | 2.625 | 2029-2041 | |
| 9 | Gustavo Luján# | 2.633 | 2029-2040 | |
| 10 | Gary Edwards | 2.656 | 2009-2018 | |
| 11 | Manuel Piñal# | 2.667 | 2032-2041 | |
| 12 | José Morín | 2.688 | 2016-2020 | |
| 13 | Walt Porter# | 2.691 | 2027-2041 | |
| 14 | Ángel López# | 2.710 | 2031-2041 | |
| 15 | Miguel Cordero# | 2.728 | 2027-2041 | |
| 16 | José Rodríguez | 2.745 | 2028-2037 | |
| 17 | Ken Martínez# | 2.833 | 2031-2041 | |
| 18 | Humberto Hernández# | 2.850 | 2035-2041 | |
| 19 | Carlton Minor# | 2.858 | 2027-2041 | |
| 20 | Jesús Salazar# | 2.889 | 2036-2041 | |
| 21 | Domingo Pérez# | 2.894 | 2036-2041 | |
| 22 | Mal Benton | 2.929 | 2017-2029 | |
| 23 | Juan Martínez | 2.931 | 2012-2025 | |
| 24 | Eduardo Camacho# | 2.939 | 2027-2041 | |
| 25 | Alberto Caballero# | 2.940 | 2036-2041 | |
| 26 | Jorge Valentín | 2.944 | 2030-2040 | |
| 27 | Eiichi Nakao | 2.984 | 2010-2020 | |
| 28 | Martin Rodríguez# | 2.994 | 2034-2041 | |
| 29 | Tony Salazar# | 3.004 | 2029-2041 | |
| 30 | Joe Rivera | 3.008 | 2029-2038 | |
| 31 | Arturo Ramírez | 3.039 | 2013-2029 | |
| 32 | José Méndez | 3.113 | 2012-2025 | |
| 33 | Tomás Esparza | 3.114 | 2012-2039 | |
| 34 | Iván Rosa | 3.160 | 2028-2040 | |
| 35 | Jay Black# | 3.173 | 2021-2041 | |
| 36 | Jesús Cantú | 3.182 | 2019-2040 | |
| 37 | Rafael Salas# | 3.230 | 2023-2041 | |
| 38 | Fernando Vásquez# | 3.242 | 2030-2041 | |
| 39 | Martín Martínez# | 3.243 | 2028-2041 | |
| 40 | Jorge Alou | 3.279 | 2021-2039 | |
| 40 | Armando Rodríguez# | 3.279 | 2030-2041 | |
| 42 | Juan Gonzáles | 3.296 | 2023-2040 | |
| 43 | Emílio Alvarado | 3.373 | 2007-2012 | |
| 44 | Alfredo García | 3.427 | 2015-2028 | |
| 45 | Alonso Flores# | 3.457 | 2030-2041 | |
| 46 | Pedro Ramírez | 3.507 | 2007-2016 | |
| 47 | José Gonzáles# | 3.544 | 2027-2041 | |
| 48 | Alonso González | 3.639 | 2019-2031 | |
| 49 | Jerry Collins | 3.653 | 2007-2024 | |
| 50 | Manuel Ávila# | 3.709 | 2021-2041 | |
| 51 | Juan Román | 3.714 | 2014-2024 | |
| 52 | Rafael Quintero | 3.850 | 2027-2035 | |
| 53 | Luis Cantú | 3.878 | 2022-2027 | |
| 54 | António Rodríguez# | 3.953 | 2028-2041 | |
| 55 | Jorge Escamilla# | 4.376 | 2025-2041 | |
| 56 | Jerome Beaton | 4.840 | 2007-2013 |
