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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Carlos Moreno | 0.000 | 2008 | |
| 1 | Félix Villalobas# | 0.000 | 2037 | |
| 3 | Jesús Muñóz# | 0.397 | 2038 | |
| 4 | Tony Alvarado# | 0.466 | 2039 | |
| 5 | António Flores# | 0.482 | 2040 | |
| 6 | Ralph Dean | 0.871 | 2013 | |
| 7 | Pedro Ramírez# | 0.931 | 2033 | |
| 8 | Hideki Takahashi | 1.059 | 2011 | |
| 9 | Bernie Jacoby | 1.125 | 2021 | |
| 10 | Norm Hawk | 1.200 | 2008 | |
| 11 | Félix Villalobas# | 1.209 | 2036 | |
| 12 | José Torres# | 1.286 | 2039 | |
| 13 | Takiji Nakamura | 1.333 | 2013 | |
| 14 | Jorge Gallegos | 1.421 | 2011 | |
| 15 | Luis Mendoza# | 1.500 | 2038 | |
| 16 | Ralph Dean | 1.521 | 2012 | |
| 17 | Álex Martínez | 1.552 | 2012 | |
| 18 | Arthur Graham | 1.620 | 2014 | |
| 19 | Manuel Ramírez | 1.688 | 2008 | |
| 20 | Carlos Martínez | 1.800 | 2008 | |
| 20 | Ángel Alemán | 1.800 | 2007 | |
| 22 | Toshiki Harada | 1.831 | 2010 | |
| 23 | Esteban Ramírez# | 1.906 | 2036 | |
| 24 | Sergio Pinzón# | 1.964 | 2034 | |
| 25 | José Bernal# | 2.015 | 2039 | |
| 26 | Carlos Moreno | 2.077 | 2007 | |
| 27 | Luis Mendoza# | 2.198 | 2037 | |
| 28 | Carlos Flores# | 2.250 | 2032 | |
| 28 | Juan Flores# | 2.250 | 2038 | |
| 30 | Ramón Torres# | 2.328 | 2038 | |
| 30 | Manny Flores# | 2.328 | 2039 | |
| 32 | Pedro Chávez | 2.382 | 2016 | |
| 33 | Pedro Ramírez | 2.400 | 2009 | |
| 34 | Carlos Moreno | 2.418 | 2011 | |
| 35 | David Hernández | 2.423 | 2011 | |
| 36 | Ramón Villalobos# | 2.483 | 2036 | |
| 37 | Ricardo Martínez | 2.585 | 2030 | |
| 38 | Júlio Ramos# | 2.793 | 2034 | |
| 39 | Pedro Garza | 2.893 | 2026 | |
| 40 | Félix Villalobas# | 2.935 | 2029 | |
| 40 | Ricardo Encarnación# | 2.935 | 2041 | |
| 42 | Diego Quiñones# | 3.042 | 2039 | |
| 43 | Sergio López | 3.115 | 2020 | |
| 44 | Pedro Reyes | 3.176 | 2038 | |
| 45 | José Morín | 3.203 | 2030 | |
| 46 | Matt Hancock | 3.224 | 2020 | |
| 47 | Cristián Contreras | 3.240 | 2036 | |
| 48 | José Pérez# | 3.273 | 2035 | |
| 49 | Harry Sullivan | 3.329 | 2011 | |
| 50 | Gabriel Letona | 3.375 | 2009 | |
| 51 | Norm Hawk | 3.447 | 2007 | |
| 51 | Bartolo López | 3.447 | 2007 | |
| 53 | Manuel Sánchez# | 3.522 | 2037 | |
| 54 | Alejandro Soto# | 3.661 | 2041 | |
| 55 | Félix Villalobas# | 3.750 | 2035 | |
| 56 | Carlos Camacho | 3.789 | 2021 | |
| 56 | Carlos Icaza | 3.789 | 2031 | |
| 58 | Ricardo Encarnación# | 3.857 | 2039 | |
| 59 | José Torres# | 3.932 | 2030 | |
| 60 | Ricardo Martínez | 4.021 | 2028 | |
| 61 | Zander Miller | 4.109 | 2015 | |
| 62 | Mito Ichihara | 4.339 | 2010 | |
| 63 | José Bernal# | 4.368 | 2041 | |
| 63 | Manuel Muñóz# | 4.368 | 2037 | |
| 65 | Ronald Dennis | 4.673 | 2009 | |
| 66 | Álex Martínez | 4.737 | 2013 | |
| 67 | Juan Cardenas | 4.765 | 2013 | |
| 68 | Arthur Graham | 4.836 | 2015 | |
| 69 | Alejandro Soto# | 4.985 | 2037 | |
| 70 | Martín Silva | 5.192 | 2032 | |
| 71 | Ramón Villalobos# | 5.815 | 2035 | |
| 72 | Carlos Cosme# | 6.000 | 2033 | |
| 72 | Javier Ferreira# | 6.000 | 2040 | |
| 74 | José Pérez# | 6.052 | 2036 | |
| 75 | António Lima# | 6.382 | 2033 | |
| 76 | César Soto | 6.894 | 2023 | |
| 77 | Armando Tapia | 7.043 | 2009 | |
| 78 | To-wai Zhou | 7.312 | 2019 |
