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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Joe Hardy# | 1.314 | 2032 | |
| 2 | Joe Hardy# | 1.605 | 2031 | |
| 3 | Joe Hardy# | 1.707 | 2033 | |
| 4 | Joe Hardy# | 1.761 | 2028 | |
| 5 | Joe Hardy# | 1.797 | 2027 | |
| 6 | Tanner Johnson# | 1.851 | 2033 | |
| 7 | Tanner Johnson# | 2.018 | 2026 | |
| 8 | Maurice Gould | 2.066 | 2015 | |
| 9 | Felipe Arreola# | 2.111 | 2032 | |
| 10 | Joe Hardy# | 2.159 | 2030 | |
| 11 | Mitsunari Kobayashi# | 2.172 | 2031 | |
| 12 | Tanner Johnson# | 2.173 | 2030 | |
| 13 | Joe Hardy# | 2.214 | 2029 | |
| 14 | Félix Reina# | 2.233 | 2032 | |
| 14 | Maurice Gould | 2.233 | 2012 | |
| 16 | Tanner Johnson# | 2.247 | 2029 | |
| 17 | Tanner Johnson# | 2.267 | 2028 | |
| 18 | Toyotomi Nakano# | 2.268 | 2026 | |
| 19 | Joe Hardy# | 2.291 | 2025 | |
| 20 | Kent Rose | 2.344 | 2012 | |
| 21 | Maurice Gould | 2.349 | 2013 | |
| 22 | Roberto Martínez | 2.366 | 2012 | |
| 23 | Curt Rhodes | 2.396 | 2025 | |
| 24 | Maurice Gould | 2.398 | 2021 | |
| 25 | Jake Nelson | 2.412 | 2016 | |
| 26 | Manuel Ruíz | 2.424 | 2012 | |
| 27 | Tanner Johnson# | 2.432 | 2032 | |
| 28 | Scott Wilson | 2.435 | 2015 | |
| 28 | Anthony Atkinson | 2.435 | 2020 | |
| 30 | Peter Miner# | 2.455 | 2033 | |
| 31 | Tanner Johnson# | 2.473 | 2025 | |
| 32 | Tanner Johnson# | 2.505 | 2031 | |
| 33 | Peter Miner# | 2.529 | 2029 | |
| 34 | Peter Miner# | 2.535 | 2032 | |
| 35 | Kinnosuke Sato | 2.539 | 2021 | |
| 36 | Roberto Martínez | 2.592 | 2013 | |
| 37 | George Alexander Lewis | 2.600 | 2019 | |
| 38 | Tom Hanson# | 2.601 | 2032 | |
| 39 | Anthony Atkinson | 2.608 | 2015 | |
| 40 | Félix Reina# | 2.629 | 2031 | |
| 41 | Maurice Gould | 2.656 | 2017 | |
| 42 | Luis Sánchez# | 2.683 | 2029 | |
| 43 | Paul Johnston | 2.717 | 2017 | |
| 44 | Evan Warner | 2.731 | 2012 | |
| 45 | Alejandro Zorros# | 2.734 | 2032 | |
| 46 | James Thompson# | 2.738 | 2032 | |
| 47 | Felipe Clavijo | 2.742 | 2028 | |
| 48 | Cohen Brouillette* | 2.752 | 2025 | |
| 49 | Jose Albertrani# | 2.758 | 2029 | |
| 50 | Mitsunari Kobayashi# | 2.759 | 2030 | |
| 51 | Kinnosuke Sato | 2.781 | 2018 | |
| 52 | Ijaz Kharoti# | 2.785 | 2032 | |
| 53 | Tomás Bravo# | 2.810 | 2032 | |
| 53 | Manuel Ruíz | 2.810 | 2013 | |
| 55 | Ange Schmit# | 2.814 | 2032 | |
| 56 | Dave Nicholson | 2.817 | 2013 | |
| 57 | José Gallegos | 2.821 | 2025 | |
| 58 | Anthony Atkinson | 2.833 | 2019 | |
| 59 | Anthony Atkinson | 2.842 | 2023 | |
| 60 | Raúl Pérez | 2.844 | 2014 | |
| 61 | Caiden Greenshield# | 2.856 | 2032 | |
| 62 | Terry Hill# | 2.878 | 2028 | |
| 63 | Kinnosuke Sato | 2.891 | 2022 | |
| 64 | John Denny# | 2.896 | 2033 | |
| 65 | Cohen Brouillette* | 2.907 | 2016 | |
| 66 | Ángel Ruíz# | 2.910 | 2032 | |
| 67 | Félix Reina# | 2.921 | 2030 | |
| 68 | Ed Lott | 2.924 | 2022 | |
| 69 | Rodrigo Garza# | 2.926 | 2033 | |
| 70 | Ryan Goldberg# | 2.931 | 2033 | |
| 71 | Paul Barrett# | 2.934 | 2023 | |
| 72 | James Jostle# | 2.936 | 2033 | |
| 73 | Peter Miner# | 2.937 | 2026 | |
| 74 | Lou Latulippe | 2.940 | 2020 | |
| 75 | Sotatsu Hayagawa# | 2.943 | 2033 | |
| 76 | Evan Warner | 2.945 | 2013 | |
| 76 | Masafumi Tamura# | 2.945 | 2031 | |
| 78 | Ángel Galindo | 2.949 | 2013 | |
| 78 | Jim Fleming | 2.949 | 2015 | |
| 80 | Matt Quinlan# | 2.962 | 2025 | |
| 81 | Adam Thomas | 2.963 | 2012 | |
| 82 | Jose Albertrani# | 2.965 | 2030 | |
| 83 | Ze-dong Zhang# | 2.972 | 2029 | |
| 84 | Paul Barrett# | 2.976 | 2028 | |
| 85 | Felipe Arreola# | 2.995 | 2031 | |
| 86 | Joey Steamer# | 3.009 | 2033 | |
| 87 | Elijah Green# | 3.010 | 2033 | |
| 88 | Félix Reina# | 3.015 | 2033 | |
| 89 | Adhipa Vemireddy# | 3.018 | 2032 | |
| 90 | Bob Ruíz# | 3.024 | 2032 | |
| 91 | Ray Weeks | 3.026 | 2025 | |
| 92 | Giobbe Tadiotto# | 3.029 | 2031 | |
| 93 | Manuel Ruíz | 3.039 | 2014 | |
| 94 | Adam Thomas | 3.043 | 2013 | |
| 95 | David Guzman# | 3.048 | 2033 | |
| 96 | Yohann Bosler# | 3.053 | 2031 | |
| 97 | Tom O'Day | 3.054 | 2022 | |
| 98 | António Gómez | 3.059 | 2015 | |
| 99 | Ross Allan# | 3.061 | 2031 | |
| 100 | Nathan Wilson | 3.071 | 2016 |
