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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jesús Hernández# | 1.713 | 2027 | |
| 2 | Emílio Mavarro# | 1.833 | 2028 | |
| 3 | Brian Walker# | 2.238 | 2028 | |
| 4 | Curt Tate# | 2.301 | 2024 | |
| 5 | John Boyle | 2.334 | 2024 | |
| 6 | Luis Ortíz# | 2.338 | 2025 | |
| 7 | Norberto Concepción# | 2.390 | 2029 | |
| 8 | Barney Starr# | 2.412 | 2028 | |
| 9 | Santo Velazco# | 2.418 | 2028 | |
| 10 | John Ball# | 2.438 | 2027 | |
| 11 | Daniel Riley# | 2.439 | 2027 | |
| 12 | Carlos Pérez | 2.455 | 2022 | |
| 13 | Rob Silva# | 2.569 | 2026 | |
| 14 | Shotaro Sugahara# | 2.581 | 2028 | |
| 15 | Osvaldo Garibe# | 2.598 | 2029 | |
| 16 | Miguel Aguilar# | 2.627 | 2025 | |
| 17 | Paco Manuel# | 2.646 | 2028 | |
| 18 | Mark Walker | 2.653 | 2023 | |
| 19 | Norberto Quintana# | 2.657 | 2024 | |
| 20 | Loeck Visser# | 2.667 | 2026 | |
| 21 | Manuel Delgado | 2.718 | 2021 | |
| 22 | Travis Grant# | 2.730 | 2023 | |
| 22 | Jorge Carrión# | 2.730 | 2025 | |
| 24 | Roberto Cantú# | 2.775 | 2023 | |
| 25 | Marv Bradford# | 2.785 | 2025 | |
| 26 | Logan Gregory# | 2.786 | 2023 | |
| 27 | Will Moore# | 2.793 | 2028 | |
| 28 | Anatoly Ivanovich# | 2.795 | 2027 | |
| 29 | Cobus Reijnen# | 2.806 | 2027 | |
| 30 | Hirokichi Kichida | 2.860 | 2019 | |
| 31 | Pat Horton | 2.869 | 2022 | |
| 32 | Doruk Oyan | 2.872 | 2022 | |
| 33 | Michael Logan | 2.886 | 2026 | |
| 34 | Bartolo Medina | 2.893 | 2025 | |
| 34 | Paul Stuart | 2.893 | 2020 | |
| 36 | Kevin Samuels# | 2.896 | 2027 | |
| 37 | Octávio Ríos# | 2.916 | 2025 | |
| 38 | Jorge Carrión# | 2.917 | 2024 | |
| 39 | Phil Miller# | 2.919 | 2028 | |
| 40 | Jack King# | 2.938 | 2025 | |
| 41 | Earl Simmons# | 2.951 | 2026 | |
| 42 | Mike Brandner# | 2.952 | 2029 | |
| 43 | Héctor Silva# | 2.962 | 2025 | |
| 44 | Kyuichi Hori# | 2.970 | 2029 | |
| 45 | Allen Yohemas# | 2.984 | 2021 | |
| 45 | Gabriel Hernández# | 2.984 | 2023 | |
| 47 | Carlos Méndez# | 2.987 | 2020 | |
| 48 | Santiago López# | 3.022 | 2028 | |
| 48 | Damien Scudder# | 3.022 | 2026 | |
| 50 | Michael Taylor# | 3.037 | 2026 | |
| 51 | Luis Castrejón# | 3.058 | 2027 | |
| 52 | Francisco Martínez | 3.059 | 2025 | |
| 53 | Dan Crowder# | 3.066 | 2025 | |
| 54 | César González# | 3.067 | 2024 | |
| 55 | Pat Hunt# | 3.076 | 2023 | |
| 56 | John Ball# | 3.084 | 2026 | |
| 57 | Maxime Janssens# | 3.087 | 2027 | |
| 58 | Santo Velazco# | 3.100 | 2029 | |
| 59 | Steve Adkins# | 3.105 | 2024 | |
| 60 | Mack MacDonald# | 3.121 | 2026 | |
| 61 | Ray Mangas# | 3.151 | 2027 | |
| 62 | Andrés Quezada# | 3.163 | 2025 | |
| 63 | Mike Brandner# | 3.165 | 2028 | |
| 64 | Santiago López# | 3.171 | 2026 | |
| 65 | Luis Ortíz# | 3.173 | 2026 | |
| 66 | Carlos Hernández# | 3.184 | 2021 | |
| 67 | Stewart Fleming# | 3.185 | 2026 | |
| 68 | Roosevelt Guimond# | 3.192 | 2028 | |
| 69 | Wes Hamm# | 3.194 | 2020 | |
| 69 | Rusty Maxson# | 3.194 | 2029 | |
| 71 | Cal Haber# | 3.196 | 2026 | |
| 72 | Phil Miller# | 3.199 | 2026 | |
| 73 | Rafael Chávez | 3.237 | 2018 | |
| 74 | Aurelio López# | 3.238 | 2020 | |
| 75 | Mike Foltynewicz# | 3.271 | 2028 | |
| 76 | Ramón Castaneda | 3.275 | 2026 | |
| 77 | Paco Peńa# | 3.285 | 2024 | |
| 78 | Shawn Arnold# | 3.289 | 2020 | |
| 79 | Stanley Williams# | 3.304 | 2018 | |
| 80 | Pat Hunt# | 3.309 | 2022 | |
| 81 | César Galló# | 3.312 | 2021 | |
| 82 | Rob Stone# | 3.330 | 2020 | |
| 83 | Robbie Baxter# | 3.355 | 2021 | |
| 84 | Leif Mayer# | 3.375 | 2025 | |
| 84 | Doruk Oyan | 3.375 | 2020 | |
| 86 | David Cole | 3.382 | 2021 | |
| 87 | Jorge Cruz# | 3.385 | 2028 | |
| 88 | Pat Hunt# | 3.396 | 2025 | |
| 89 | Luis Fernández | 3.410 | 2017 | |
| 90 | Carlos Ortíz | 3.459 | 2023 | |
| 91 | José López# | 3.462 | 2022 | |
| 92 | Ramón Ocegueda# | 3.465 | 2029 | |
| 93 | Nam Yee Yong# | 3.484 | 2027 | |
| 94 | Tristan Young# | 3.508 | 2025 | |
| 95 | José López# | 3.509 | 2024 | |
| 96 | Filip Radyuhin# | 3.516 | 2029 | |
| 97 | Homer O'Lannigan | 3.519 | 2022 | |
| 98 | Alex Simmons | 3.533 | 2021 | |
| 99 | Cole Johnson | 3.536 | 2022 | |
| 100 | Rafael Rodríguez# | 3.540 | 2023 |
