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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Tyrell Jenkins# | 2.291 | 2022 | |
| 2 | Cal Quantrill# | 2.529 | 2020 | |
| 3 | Chris Farrell | 2.539 | 2017 | |
| 4 | Craig Missigman# | 2.609 | 2019 | |
| 5 | Tyrell Jenkins# | 2.613 | 2018 | |
| 6 | Melvin Garner# | 2.716 | 2017 | |
| 7 | Justin Grimm | 2.891 | 2017 | |
| 8 | Jesus Luzardo# | 2.920 | 2021 | |
| 9 | Ramiro Solano# | 2.963 | 2018 | |
| 10 | Neftali Feliz | 2.974 | 2021 | |
| 11 | Eduardo Fernández# | 2.982 | 2021 | |
| 12 | Chad Bettis | 3.026 | 2021 | |
| 13 | Logan Gilbert# | 3.042 | 2021 | |
| 14 | Jesse Darrah | 3.089 | 2017 | |
| 15 | Jason Neal# | 3.115 | 2019 | |
| 16 | Jose Cisnero | 3.196 | 2018 | |
| 17 | Jason Adam | 3.210 | 2020 | |
| 18 | Jeriome Hill# | 3.226 | 2020 | |
| 19 | José Ramos# | 3.263 | 2019 | |
| 20 | Collin Hurrell# | 3.273 | 2023 | |
| 21 | Jackson Wilson# | 3.275 | 2021 | |
| 22 | A.J. Cole# | 3.299 | 2012 | |
| 23 | Taylor Jungmann | 3.353 | 2017 | |
| 24 | Dane Grier# | 3.361 | 2020 | |
| 25 | John Stilson | 3.390 | 2020 | |
| 26 | James Russell | 3.403 | 2014 | |
| 27 | John Stilson | 3.427 | 2017 | |
| 28 | John Hanson# | 3.429 | 2021 | |
| 29 | Chip Jackson# | 3.435 | 2021 | |
| 30 | Will Rainey# | 3.448 | 2018 | |
| 31 | Dave Smith# | 3.490 | 2018 | |
| 32 | Jack Duffey# | 3.540 | 2022 | |
| 33 | Randall Peña# | 3.547 | 2020 | |
| 34 | Matthew Wisler | 3.562 | 2020 | |
| 35 | Alex Lange# | 3.579 | 2022 | |
| 36 | J.B. Bukauskas# | 3.592 | 2020 | |
| 37 | Alex Calipari# | 3.596 | 2022 | |
| 38 | Kevin Couture | 3.607 | 2018 | |
| 39 | Eric Harris# | 3.641 | 2019 | |
| 40 | Brent Frazier# | 3.672 | 2020 | |
| 41 | Max Fried# | 3.692 | 2018 | |
| 42 | Kurt Wunderlich | 3.693 | 2016 | |
| 43 | Garrett Richards | 3.696 | 2019 | |
| 44 | Drew Taylor | 3.701 | 2014 | |
| 45 | Garrett Richards | 3.702 | 2020 | |
| 46 | Zach Rivera# | 3.704 | 2020 | |
| 47 | Fred Watts# | 3.711 | 2020 | |
| 48 | Craig Missigman# | 3.755 | 2018 | |
| 49 | William Maddox# | 3.769 | 2019 | |
| 50 | Brenny Paulino | 3.773 | 2017 | |
| 51 | Paolo Espino | 3.774 | 2015 | |
| 52 | Kurt Wunderlich | 3.784 | 2015 | |
| 53 | Masakazu Hirayama# | 3.832 | 2018 | |
| 54 | Dave Groves# | 3.834 | 2018 | |
| 55 | Michael Ynoa# | 3.865 | 2018 | |
| 56 | Blake Wood | 3.900 | 2014 | |
| 57 | Jeurys Familia | 3.902 | 2014 | |
| 57 | Bryce Bandilla | 3.902 | 2015 | |
| 59 | Ty Griffin# | 3.910 | 2023 | |
| 60 | José Ramos# | 3.913 | 2018 | |
| 61 | Enny Romero | 3.926 | 2014 | |
| 62 | Anthony Bass# | 3.929 | 2012 | |
| 63 | Joel Bender# | 3.934 | 2019 | |
| 64 | Brett Cecil | 3.959 | 2013 | |
| 65 | Julio Urias# | 3.962 | 2020 | |
| 66 | Michael Broadway# | 3.964 | 2014 | |
| 67 | Brandon Martinez# | 3.972 | 2017 | |
| 68 | Bartolo Rivera# | 3.977 | 2021 | |
| 69 | Jason Adam | 3.981 | 2019 | |
| 70 | Elvis Araujo | 3.987 | 2021 | |
| 71 | Charlie Furbush | 3.994 | 2014 | |
| 72 | Franklin Perez# | 4.000 | 2022 | |
| 72 | Drew Taylor | 4.000 | 2015 | |
| 74 | Fred Watts# | 4.020 | 2022 | |
| 75 | Enny Romero | 4.024 | 2015 | |
| 76 | Peter Tago | 4.031 | 2015 | |
| 77 | Brad Hand | 4.045 | 2012 | |
| 78 | Craig Missigman# | 4.056 | 2021 | |
| 78 | Daulton Jefferies# | 4.056 | 2020 | |
| 80 | Ralph Alexander | 4.060 | 2019 | |
| 81 | Alfredo Aceves | 4.062 | 2015 | |
| 81 | John Gast | 4.062 | 2013 | |
| 83 | José Ramos# | 4.068 | 2022 | |
| 84 | Taylor Fawkes# | 4.074 | 2022 | |
| 85 | Trevor Bauer# | 4.088 | 2013 | |
| 86 | Joe Guthrie# | 4.095 | 2020 | |
| 87 | Manuel Hernández# | 4.106 | 2018 | |
| 88 | Bobby Miller# | 4.134 | 2023 | |
| 89 | José Castro# | 4.142 | 2014 | |
| 90 | Nathan Karns | 4.145 | 2015 | |
| 91 | Dae-Eun Rhee | 4.172 | 2016 | |
| 92 | Duane Below | 4.187 | 2014 | |
| 93 | Lucas Harrell | 4.190 | 2015 | |
| 94 | Kevin Gausman# | 4.209 | 2015 | |
| 95 | Anderson Espinoza# | 4.219 | 2021 | |
| 96 | Thomas Girdwood | 4.232 | 2015 | |
| 97 | Tyler Baum# | 4.244 | 2022 | |
| 97 | Pat Swain# | 4.244 | 2022 | |
| 99 | Neil Ramirez | 4.248 | 2017 | |
| 100 | Ed Petty# | 4.266 | 2020 |
