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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Todd Hines | 2.52 | 2018-2032 | |
| 2 | Sozen Raikatuji | 2.59 | 2016-2023 | |
| 2 | John Coleman | 2.59 | 2013-2025 | |
| 4 | Ryan Davis | 2.62 | 2015-2026 | |
| 5 | Devin Hinton | 2.66 | 2013-2023 | |
| 6 | Ryan Ray | 2.79 | 2013-2021 | |
| 6 | Jesús Franco# | 2.79 | 2026-2033 | |
| 8 | Jim Eliott | 2.83 | 2014-2025 | |
| 9 | Guillermo García | 2.85 | 2013-2021 | |
| 10 | Ralph McKinney# | 2.88 | 2019-2033 | |
| 11 | Javier Ramírez | 2.89 | 2018-2027 | |
| 11 | Iván García# | 2.89 | 2021-2033 | |
| 13 | Lúcio Sánchez | 2.90 | 2017-2031 | |
| 14 | Yuri Volkers | 2.92 | 2013-2021 | |
| 15 | Jesús Caldero | 2.93 | 2018-2027 | |
| 16 | Bruce Wright | 2.95 | 2020-2030 | |
| 17 | Jorge Aguirre | 3.00 | 2015-2032 | |
| 18 | Jesús Gonzáles# | 3.02 | 2019-2030 | |
| 18 | José Hernández | 3.02 | 2013-2023 | |
| 20 | Kyle Lewis | 3.03 | 2016-2026 | |
| 21 | Pedro Alejándrez# | 3.04 | 2021-2033 | |
| 21 | Edwin Ellis | 3.04 | 2013-2019 | |
| 23 | Bill Oulton# | 3.08 | 2021-2033 | |
| 24 | John Wilkins | 3.13 | 2013-2028 | |
| 25 | Cris Mendoza | 3.15 | 2013-2029 | |
| 25 | John Kaufman | 3.15 | 2017-2032 | |
| 27 | Chester Henry | 3.16 | 2016-2023 | |
| 28 | Manuel Rojas | 3.17 | 2018-2028 | |
| 28 | Cordell Wilson | 3.17 | 2019-2030 | |
| 30 | Aurelio López# | 3.18 | 2022-2033 | |
| 31 | Vincent Hall | 3.21 | 2020-2032 | |
| 31 | Ramón Ortega | 3.21 | 2013-2028 | |
| 33 | Tom Reynolds | 3.22 | 2015-2028 | |
| 34 | Eddie Kop# | 3.24 | 2025-2033 | |
| 35 | Yoriyoshi Yamamoto | 3.25 | 2016-2026 | |
| 36 | Juan Gusmán# | 3.26 | 2024-2030 | |
| 37 | Edgardo Marín | 3.29 | 2013-2032 | |
| 38 | Bartolomeu Lio# | 3.30 | 2018-2029 | |
| 39 | Alec Pittman | 3.31 | 2016-2030 | |
| 40 | Clancy McKinney | 3.40 | 2023-2030 | |
| 40 | Adrián Fierro# | 3.40 | 2018-2033 | |
| 42 | John Dempsey# | 3.41 | 2022-2033 | |
| 43 | Juan Júlio | 3.45 | 2013-2026 | |
| 44 | Raúl Gómez# | 3.48 | 2027-2033 | |
| 44 | Wayne Craig | 3.48 | 2018-2030 | |
| 46 | Curtis Fields | 3.49 | 2016-2024 | |
| 47 | Pat Farrell | 3.53 | 2013-2022 | |
| 48 | George Frazier# | 3.54 | 2019-2033 | |
| 49 | Wes Hamm# | 3.55 | 2021-2033 | |
| 49 | Alejandro Guerra# | 3.55 | 2027-2033 | |
| 49 | Billy Crawford | 3.55 | 2014-2025 | |
| 52 | Ilie Paunescu# | 3.56 | 2016-2033 | |
| 53 | Reid Garner | 3.59 | 2015-2022 | |
| 54 | José García# | 3.60 | 2022-2033 | |
| 55 | Wayne Hurst | 3.63 | 2015-2024 | |
| 56 | Fraser Cuevas# | 3.64 | 2020-2032 | |
| 57 | Raúl Areola# | 3.65 | 2020-2033 | |
| 58 | Burt Booth | 3.67 | 2013-2026 | |
| 59 | Enrique Cortéz# | 3.70 | 2022-2032 | |
| 60 | Juan Torres# | 3.71 | 2023-2029 | |
| 61 | Kirby Brown | 3.76 | 2017-2029 | |
| 62 | Allen Blair# | 3.80 | 2021-2033 | |
| 62 | José Flores# | 3.80 | 2019-2029 | |
| 64 | Bill Fletcher | 3.81 | 2018-2025 | |
| 65 | Miguel Castillo | 3.82 | 2013-2020 | |
| 66 | Luis Flores# | 3.83 | 2024-2033 | |
| 67 | Miguel Rubia# | 3.86 | 2029-2033 | |
| 67 | Mimosa Joseph# | 3.86 | 2023-2033 | |
| 69 | Germán Rodríguez# | 3.87 | 2024-2033 | |
| 70 | Ramón Molina# | 3.89 | 2026-2033 | |
| 71 | Bill Grange | 3.94 | 2013-2017 | |
| 72 | Juan Valéncia# | 3.95 | 2023-2033 | |
| 73 | Mario Peńa | 3.98 | 2013-2023 | |
| 74 | Peter Rivers | 3.99 | 2013-2020 | |
| 75 | Jaime van de Weideven# | 4.00 | 2022-2033 | |
| 76 | Addie Samson# | 4.01 | 2021-2033 | |
| 77 | Enrique Magana | 4.04 | 2013-2019 | |
| 78 | Josef van der Poel# | 4.05 | 2019-2033 | |
| 79 | Juan Pérez# | 4.06 | 2020-2032 | |
| 80 | Vern Camp | 4.08 | 2013-2022 | |
| 81 | Makoto Kato | 4.17 | 2019-2024 | |
| 82 | Natalino Golaio# | 4.25 | 2023-2033 | |
| 83 | Tobías Pérez# | 4.27 | 2024-2033 | |
| 84 | Pedro Martínez | 4.28 | 2013-2017 | |
| 85 | Pablo De La Torre# | 4.30 | 2021-2033 | |
| 86 | Yin-fat Foong | 4.36 | 2017-2029 | |
| 86 | Cole Hall | 4.36 | 2013-2027 | |
| 88 | Valentín Rivera# | 4.44 | 2026-2033 | |
| 89 | Calvin Beck# | 4.45 | 2026-2033 | |
| 90 | Michael Battle | 4.58 | 2014-2024 | |
| 91 | Kaluka Wene | 4.63 | 2016-2029 | |
| 92 | Edgar Martínez | 4.78 | 2013-2021 | |
| 93 | Marshall Edwards | 4.99 | 2013-2022 | |
| 94 | Pedro Ramírez# | 5.08 | 2023-2032 | |
| 95 | Armando Hernández | 5.73 | 2013-2018 |
