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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Austin Malinowski# | 1.734 | 2016 | |
| 2 | Billy Bishop# | 2.102 | 2022 | |
| 3 | Kyle Rogers# | 2.226 | 2020 | |
| 4 | Sixto Sanchez# | 2.368 | 2020 | |
| 5 | Rich Beasley# | 2.377 | 2019 | |
| 6 | Robert Gasser# | 2.460 | 2023 | |
| 7 | Billy Bishop# | 2.543 | 2020 | |
| 8 | Harry Richardson# | 2.601 | 2018 | |
| 9 | Alex Early# | 2.669 | 2023 | |
| 10 | Calvin Welch# | 2.682 | 2019 | |
| 11 | Edward Small# | 2.718 | 2017 | |
| 12 | T.J. Sikkema# | 2.725 | 2022 | |
| 13 | Kyle Rogers# | 2.752 | 2021 | |
| 14 | Michael Torretta# | 2.778 | 2018 | |
| 15 | Reid Detmers# | 2.848 | 2021 | |
| 16 | Jud Graham# | 2.882 | 2017 | |
| 17 | Lawrence Taylor# | 2.884 | 2017 | |
| 18 | James Marinan# | 2.902 | 2022 | |
| 19 | Alex Early# | 2.937 | 2022 | |
| 20 | Julio Robina# | 2.961 | 2023 | |
| 21 | Carlos García | 2.987 | 2015 | |
| 22 | Cy Young, IV# | 3.053 | 2022 | |
| 22 | Mason Denaburg# | 3.053 | 2020 | |
| 24 | Sean Hjelle# | 3.083 | 2020 | |
| 25 | Ken Waldichuk# | 3.109 | 2021 | |
| 26 | Billy Bishop# | 3.166 | 2021 | |
| 27 | Billy Bishop# | 3.180 | 2019 | |
| 28 | Ryan Sims# | 3.246 | 2022 | |
| 29 | Wes Clark# | 3.259 | 2019 | |
| 30 | Nick Robison# | 3.282 | 2016 | |
| 31 | Esteban Vázquez# | 3.290 | 2020 | |
| 32 | Ryan Sims# | 3.360 | 2021 | |
| 33 | Tony Gutiérrez# | 3.389 | 2020 | |
| 34 | Danny William# | 3.411 | 2017 | |
| 35 | Jorge Flores# | 3.412 | 2019 | |
| 36 | Ray Harris | 3.451 | 2014 | |
| 37 | Alvin Tigner# | 3.460 | 2023 | |
| 38 | Matt Parker# | 3.463 | 2020 | |
| 39 | Nathan Armstrong# | 3.486 | 2022 | |
| 40 | Jack Kochanowicz# | 3.524 | 2021 | |
| 41 | Ken Gary# | 3.558 | 2018 | |
| 42 | Justin Collop | 3.571 | 2012 | |
| 43 | Drew Rom# | 3.596 | 2023 | |
| 44 | Carlos Martínez# | 3.767 | 2023 | |
| 45 | Tahnaj Thomas# | 3.769 | 2021 | |
| 46 | Alex Meyer | 3.776 | 2012 | |
| 47 | Tate Rodemaker# | 3.789 | 2023 | |
| 48 | Mason Denaburg# | 3.801 | 2019 | |
| 49 | Eduardo Rodriguez# | 3.835 | 2015 | |
| 50 | Kyle Zimmer | 3.857 | 2014 | |
| 51 | Anthony Klumpp# | 3.998 | 2018 | |
| 52 | Víctor De La Rosa | 4.036 | 2014 | |
| 53 | Doug Nikhazy# | 4.050 | 2023 | |
| 54 | Jeff Wiley | 4.201 | 2017 | |
| 55 | Skylar Spurrier# | 4.269 | 2021 | |
| 56 | J.D. Shockley# | 4.339 | 2020 | |
| 57 | Maverick Kingsburry# | 4.357 | 2022 | |
| 58 | Robert Hayes | 4.384 | 2019 | |
| 59 | Bobby Simmons# | 4.510 | 2023 | |
| 60 | Richard White# | 4.593 | 2013 | |
| 61 | Jack Kochanowicz# | 4.596 | 2023 | |
| 62 | Peter Solomon# | 4.685 | 2019 | |
| 63 | Juan Romero# | 4.725 | 2014 | |
| 64 | Domingo Tapia | 4.846 | 2013 | |
| 65 | Don Day# | 4.877 | 2018 | |
| 66 | Don Day# | 4.938 | 2017 | |
| 67 | Patrick Wischusen# | 5.013 | 2023 | |
| 68 | Carlos Pimentel | 5.035 | 2013 | |
| 69 | Mason Radeke# | 5.066 | 2013 | |
| 70 | Will Inman | 5.072 | 2012 | |
| 71 | José Ortega# | 5.120 | 2021 | |
| 72 | William Cuevas | 5.151 | 2014 | |
| 73 | Jason McCracken# | 5.253 | 2014 | |
| 74 | Hideaki Hirose# | 5.425 | 2013 | |
| 75 | Nino Guillaume# | 5.858 | 2018 |
