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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | William Cuevas# | 2.361 | 2021 | |
| 2 | Domingo German# | 2.671 | 2017 | |
| 3 | Eric Hacker | 2.769 | 2021 | |
| 4 | Roenis Elias | 2.774 | 2014 | |
| 5 | Dylan Floro# | 2.948 | 2015 | |
| 6 | Luis Mateo | 2.957 | 2015 | |
| 7 | Eric Jokisch# | 3.057 | 2024 | |
| 8 | D.J. Baxendale | 3.086 | 2017 | |
| 9 | Jacob Lee | 3.106 | 2015 | |
| 10 | Dillon Peters# | 3.154 | 2023 | |
| 11 | Tyler Pill | 3.160 | 2015 | |
| 12 | Odrisamer Despaigne# | 3.165 | 2024 | |
| 13 | Cole Winn# | 3.166 | 2023 | |
| 14 | Tyler Glasnow# | 3.203 | 2015 | |
| 15 | Austin Ross | 3.225 | 2013 | |
| 16 | Max Meyer# | 3.255 | 2023 | |
| 17 | Branden Kline | 3.282 | 2015 | |
| 18 | James Marvel | 3.297 | 2021 | |
| 19 | Tommy Sommer# | 3.299 | 2023 | |
| 20 | Ethan Hankins# | 3.342 | 2025 | |
| 21 | Sonny Gray# | 3.353 | 2013 | |
| 22 | Matt Allan# | 3.361 | 2023 | |
| 23 | Jonathan Dziedzic | 3.414 | 2017 | |
| 24 | Jose Urena# | 3.498 | 2014 | |
| 25 | Jordan Barrett | 3.522 | 2021 | |
| 26 | Jack Carey# | 3.550 | 2024 | |
| 27 | Pierce Johnson# | 3.554 | 2014 | |
| 28 | Humberto Mejia# | 3.557 | 2021 | |
| 29 | Marlin Willis# | 3.558 | 2020 | |
| 29 | Gerardo Carrillo# | 3.558 | 2022 | |
| 31 | Adalberto Mejia | 3.581 | 2016 | |
| 32 | Jacob Degrom# | 3.582 | 2013 | |
| 33 | Seth Romero | 3.592 | 2021 | |
| 34 | Eric Hacker | 3.600 | 2022 | |
| 35 | Eric Hacker | 3.611 | 2017 | |
| 36 | Christopher Kirsch | 3.647 | 2017 | |
| 37 | Ryan Butler | 3.676 | 2017 | |
| 38 | Cole Winn# | 3.679 | 2024 | |
| 39 | Corey Ray | 3.704 | 2017 | |
| 40 | Domingo Acevedo# | 3.707 | 2018 | |
| 41 | Jimmy Gillheeney | 3.732 | 2014 | |
| 42 | Seth Johnson# | 3.774 | 2023 | |
| 43 | Drew Verhagen# | 3.806 | 2021 | |
| 44 | Branden Kline | 3.808 | 2016 | |
| 45 | D.J. Baxendale | 3.874 | 2016 | |
| 46 | Mason Hope | 3.901 | 2013 | |
| 47 | Dane Myers# | 4.059 | 2023 | |
| 48 | Ryan Forcucci# | 4.065 | 2025 | |
| 49 | Patrick Francescon | 4.074 | 2015 | |
| 50 | Mike Vasil# | 4.077 | 2024 | |
| 51 | Beau Burrows# | 4.085 | 2020 | |
| 52 | Andrew Church | 4.146 | 2020 | |
| 53 | Kyle Zimmer | 4.184 | 2014 | |
| 54 | Ryan Murphy# | 4.188 | 2024 | |
| 55 | Mason Thompson# | 4.196 | 2021 | |
| 56 | Mark Leiter Jr.# | 4.225 | 2018 | |
| 57 | Christian James | 4.230 | 2020 | |
| 58 | Logan Darnell | 4.243 | 2014 | |
| 59 | Percy Garner | 4.257 | 2013 | |
| 60 | Tyler Phillips# | 4.263 | 2020 | |
| 61 | Shane Carle | 4.267 | 2015 | |
| 62 | Logan Rinehart# | 4.337 | 2024 | |
| 63 | Tyler Rogers# | 4.380 | 2016 | |
| 64 | Tyler Rogers# | 4.405 | 2015 | |
| 65 | Hoby Milner# | 4.416 | 2014 | |
| 66 | David Buchanan# | 4.446 | 2025 | |
| 67 | Justin Nicolino | 4.461 | 2014 | |
| 68 | Yariel Rodriguez# | 4.490 | 2024 | |
| 69 | Brock Dykxhoorn | 4.500 | 2022 | |
| 70 | Mike Gibbons | 4.531 | 2022 | |
| 71 | Patrick Francescon | 4.561 | 2014 | |
| 72 | Tyler Pill | 4.591 | 2014 | |
| 73 | Gabriel Ynoa | 4.593 | 2014 | |
| 74 | Brendan Beck# | 4.596 | 2025 | |
| 75 | Zachary Nuding | 4.614 | 2016 | |
| 76 | Casey Bloomquist | 4.618 | 2020 | |
| 77 | Jonathan Bowlan# | 4.672 | 2020 | |
| 78 | Colten Brewer# | 4.724 | 2013 | |
| 79 | Luke Albright# | 4.747 | 2024 | |
| 80 | Justin Ferrell | 4.799 | 2019 | |
| 81 | Luis Reyes# | 4.804 | 2022 | |
| 82 | Williams Perez | 4.806 | 2015 | |
| 83 | Tyler Viza# | 4.848 | 2018 | |
| 84 | Jacob Lee | 4.877 | 2016 | |
| 85 | James Marvel | 4.903 | 2023 | |
| 86 | Joshua Loeschorn# | 4.965 | 2025 | |
| 87 | Owen Wild# | 4.992 | 2025 | |
| 88 | Frank Duncan | 4.994 | 2018 | |
| 89 | Ryan Doran | 5.043 | 2015 | |
| 90 | Tyler Skulina | 5.051 | 2017 | |
| 91 | Casey Kelly# | 5.097 | 2025 | |
| 92 | Jairo Heredia | 5.108 | 2013 | |
| 93 | Alec Gamboa# | 5.129 | 2025 | |
| 94 | Tyler Phillips# | 5.143 | 2019 | |
| 95 | Max Roberts# | 5.146 | 2024 | |
| 96 | Luis Diaz | 5.163 | 2016 | |
| 97 | Riley Gowens# | 5.240 | 2025 | |
| 98 | Josh Maciejewski# | 5.274 | 2021 | |
| 99 | Blake Logan | 5.352 | 2014 | |
| 100 | Brett Kennedy# | 5.364 | 2018 |
