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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jorge Aguirre* | 1.112 | 2020 | |
| 2 | Jim Eliott* | 1.402 | 2019 | |
| 3 | Guillermo García | 1.415 | 2014 | |
| 4 | Ryan Davis* | 1.476 | 2017 | |
| 5 | Todd Hines* | 1.483 | 2021 | |
| 6 | Guillermo García | 1.573 | 2015 | |
| 7 | Todd Hines* | 1.592 | 2018 | |
| 8 | Kenji Aoki# | 1.656 | 2035 | |
| 9 | Miguel Rubia | 1.703 | 2035 | |
| 10 | Edwin Ellis | 1.719 | 2015 | |
| 11 | Todd Hines* | 1.815 | 2019 | |
| 12 | Jorge Aguirre* | 1.849 | 2018 | |
| 13 | Alec Pittman | 1.899 | 2019 | |
| 14 | Andrew Moody# | 1.919 | 2035 | |
| 15 | Bill Oulton | 1.936 | 2025 | |
| 16 | Jim Eliott* | 1.948 | 2017 | |
| 17 | Bruce Wright | 1.952 | 2023 | |
| 18 | Charles Dobson | 2.010 | 2028 | |
| 19 | Lúcio Sánchez* | 2.028 | 2023 | |
| 20 | Roderick Rhodes | 2.038 | 2024 | |
| 21 | Jesús Vidro# | 2.048 | 2039 | |
| 22 | Tom Reynolds* | 2.063 | 2020 | |
| 23 | Jim Eliott* | 2.069 | 2018 | |
| 24 | Mike Donovan# | 2.096 | 2041 | |
| 24 | Jesús Gonzáles | 2.096 | 2028 | |
| 26 | Wayne Craig | 2.103 | 2020 | |
| 27 | Jesús Gonzáles | 2.110 | 2021 | |
| 28 | Raúl Romero# | 2.113 | 2035 | |
| 29 | Tetsuzan Kaneko | 2.119 | 2018 | |
| 30 | Ramón Ortega* | 2.124 | 2020 | |
| 31 | Kyle Lewis | 2.126 | 2019 | |
| 32 | Cris Mendoza | 2.154 | 2017 | |
| 33 | John Wilkins* | 2.164 | 2019 | |
| 34 | Ryan Davis* | 2.166 | 2015 | |
| 35 | Lúcio Sánchez* | 2.173 | 2026 | |
| 36 | Guillermo García | 2.178 | 2013 | |
| 37 | Ralph McKinney* | 2.197 | 2023 | |
| 37 | Tony Alfonso# | 2.197 | 2041 | |
| 39 | Sozen Raikatuji* | 2.204 | 2017 | |
| 40 | Manuel Rojas | 2.214 | 2018 | |
| 41 | Cordell Wilson | 2.222 | 2022 | |
| 42 | Piotr Oja | 2.223 | 2032 | |
| 43 | Yoriyoshi Yamamoto | 2.224 | 2018 | |
| 44 | José Hernández | 2.225 | 2016 | |
| 45 | Kyle Lewis | 2.242 | 2018 | |
| 45 | Jesús Franco | 2.242 | 2030 | |
| 47 | John Kaufman* | 2.244 | 2022 | |
| 48 | Wes Hamm* | 2.250 | 2029 | |
| 48 | Enrique Castro | 2.250 | 2033 | |
| 48 | Sozen Raikatuji* | 2.250 | 2021 | |
| 51 | Tom Reynolds* | 2.255 | 2025 | |
| 51 | Lúcio Sánchez* | 2.255 | 2022 | |
| 53 | Cordell Wilson | 2.258 | 2026 | |
| 54 | Jim Eliott* | 2.263 | 2020 | |
| 55 | Ryan Ray | 2.269 | 2013 | |
| 56 | Javier Ramírez | 2.272 | 2022 | |
| 57 | Chester Henry | 2.276 | 2018 | |
| 58 | Javier Mora | 2.293 | 2024 | |
| 59 | Paul Díaz | 2.297 | 2022 | |
| 60 | Curtis Fields | 2.300 | 2017 | |
| 60 | Ralph McKinney* | 2.300 | 2026 | |
| 62 | Eric Matson | 2.314 | 2035 | |
| 63 | Pedro Alejándrez* | 2.319 | 2030 | |
| 64 | Ramón Ortega* | 2.324 | 2018 | |
| 65 | Charles Dobson | 2.325 | 2027 | |
| 66 | Edgardo Marín | 2.326 | 2015 | |
| 67 | Cris Mendoza | 2.339 | 2016 | |
| 68 | Kyle Boddy | 2.341 | 2028 | |
| 69 | António Cruz | 2.354 | 2013 | |
| 70 | Lúcio Sánchez* | 2.355 | 2027 | |
| 71 | Eddie Kop | 2.356 | 2029 | |
| 72 | José Hernández | 2.357 | 2017 | |
| 73 | Ralph McKinney* | 2.361 | 2020 | |
| 74 | Jesús Franco | 2.363 | 2027 | |
| 75 | Sozen Raikatuji* | 2.382 | 2019 | |
| 75 | John Wilkins* | 2.382 | 2013 | |
| 77 | John Kaufman* | 2.388 | 2019 | |
| 78 | Bruce Wright | 2.390 | 2025 | |
| 79 | Vincent Hall | 2.398 | 2022 | |
| 79 | António Solís | 2.398 | 2013 | |
| 81 | Eric Matson | 2.403 | 2036 | |
| 82 | Aurelio López | 2.407 | 2024 | |
| 83 | Yoriyoshi Yamamoto | 2.408 | 2020 | |
| 84 | Guillermo García | 2.409 | 2017 | |
| 85 | Pedro Alejándrez* | 2.415 | 2028 | |
| 86 | Sozen Raikatuji* | 2.432 | 2022 | |
| 87 | Ramón Ortega* | 2.438 | 2019 | |
| 88 | Eric Matson | 2.440 | 2032 | |
| 89 | Kenny Aarnoutse# | 2.443 | 2035 | |
| 90 | Cris Mendoza | 2.445 | 2018 | |
| 91 | Hermenegildo Beliago# | 2.455 | 2032 | |
| 92 | Ralph McKinney* | 2.459 | 2021 | |
| 93 | Jesús Franco | 2.469 | 2033 | |
| 94 | Ralph McKinney* | 2.472 | 2028 | |
| 95 | Matt Webber | 2.474 | 2025 | |
| 96 | Raúl Romero# | 2.476 | 2040 | |
| 97 | Rhys Maskell# | 2.483 | 2037 | |
| 98 | Raúl Areola | 2.487 | 2023 | |
| 99 | Raúl Gómez | 2.491 | 2030 | |
| 100 | Gerardo Pagán# | 2.494 | 2032 |
