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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Gordon Graceffo# | 2.865 | 2023 | |
| 2 | Chase Silseth# | 3.070 | 2023 | |
| 3 | Franklin Morales | 3.109 | 2014 | |
| 4 | Jose Mesa Jr. | 3.210 | 2021 | |
| 5 | Brandon Dickson | 3.276 | 2009 | |
| 6 | Michael Lorenzen# | 3.382 | 2016 | |
| 7 | Daniel Lynch# | 3.431 | 2021 | |
| 8 | Ross Detwiler | 3.463 | 2016 | |
| 9 | Ashton Goudeau | 3.494 | 2022 | |
| 10 | D.L. Hall# | 3.643 | 2022 | |
| 11 | Thomas Hatch# | 3.705 | 2024 | |
| 12 | Ryan Feierabend | 3.726 | 2006 | |
| 13 | Jacob Esch | 3.785 | 2017 | |
| 14 | Zach Lee | 3.802 | 2016 | |
| 15 | Daniel Corcino | 3.892 | 2013 | |
| 16 | Cade Povich# | 3.897 | 2024 | |
| 17 | Chris Reed | 3.951 | 2014 | |
| 18 | Dylan Bundy | 4.071 | 2013 | |
| 19 | Eric Jokisch# | 4.073 | 2016 | |
| 20 | Jake Irvin# | 4.084 | 2023 | |
| 21 | Adonis Medina# | 4.121 | 2022 | |
| 22 | John Gant | 4.154 | 2016 | |
| 23 | Ryan Weathers# | 4.174 | 2024 | |
| 24 | Bobby Doran | 4.280 | 2016 | |
| 25 | Robert Rasmussen | 4.385 | 2014 | |
| 26 | Adonis Medina# | 4.391 | 2021 | |
| 27 | Ryan Williams | 4.406 | 2018 | |
| 28 | Franklin Morales | 4.420 | 2015 | |
| 29 | Jeremy Beasley# | 4.423 | 2022 | |
| 30 | Jordan Wicks# | 4.441 | 2023 | |
| 31 | Tyler Phillips# | 4.448 | 2021 | |
| 32 | Peter Lambert# | 4.479 | 2024 | |
| 33 | Drew Rom# | 4.489 | 2023 | |
| 34 | Daniel Espino# | 4.500 | 2023 | |
| 35 | Josh Rogers# | 4.540 | 2021 | |
| 36 | Trent Baker# | 4.542 | 2023 | |
| 37 | Quinn Priester# | 4.549 | 2023 | |
| 38 | Jose Berrios# | 4.613 | 2014 | |
| 39 | Jake Thompson | 4.646 | 2015 | |
| 40 | Joshua Smith | 4.776 | 2015 | |
| 41 | Eric Jokisch# | 4.801 | 2015 | |
| 42 | Kyle Lotzkar | 4.809 | 2013 | |
| 43 | Rhett Kouba# | 4.871 | 2024 | |
| 44 | Colin Peluse# | 4.873 | 2024 | |
| 45 | Matt Heidenreich | 4.919 | 2015 | |
| 46 | Thomas Lee | 4.967 | 2021 | |
| 47 | Jimmy Nelson | 4.980 | 2014 | |
| 48 | Jerry Sullivan | 5.031 | 2015 | |
| 49 | Bobby Doran | 5.084 | 2014 | |
| 50 | Brody Colvin | 5.087 | 2015 | |
| 51 | Tyler Chatwood | 5.149 | 2013 | |
| 52 | T.J. House | 5.176 | 2014 | |
| 53 | Andrew Albers | 5.250 | 2013 | |
| 54 | Martin Perez# | 5.267 | 2013 | |
| 55 | Ian Bedell# | 5.324 | 2025 | |
| 56 | Ramon Rosso# | 5.336 | 2022 | |
| 57 | Aaron Brooks# | 5.353 | 2014 | |
| 58 | Zach Petrick | 5.400 | 2016 | |
| 59 | Nick McCully | 5.412 | 2014 | |
| 60 | Adam Morgan | 5.421 | 2014 | |
| 61 | Jacob Kmatz# | 5.425 | 2025 | |
| 62 | Andrew Ferguson | 5.459 | 2014 | |
| 63 | Greg Nappo | 5.470 | 2017 | |
| 64 | Jake Walkinshaw# | 5.503 | 2025 | |
| 65 | Tyler Wagner | 5.553 | 2018 | |
| 66 | Chris Heston | 5.714 | 2013 | |
| 67 | Adam Morgan | 5.734 | 2013 | |
| 68 | David Leal# | 5.777 | 2025 | |
| 68 | Bobby Doran | 5.777 | 2015 | |
| 70 | Zachary Neal | 5.844 | 2016 | |
| 71 | Luis Devers# | 5.904 | 2025 | |
| 72 | Matt Heidenreich | 5.914 | 2014 | |
| 73 | Pedro Vasquez | 5.919 | 2020 | |
| 74 | Mariano Llorens | 5.927 | 2016 | |
| 75 | Adam Morgan | 5.990 | 2015 | |
| 76 | Bryan Evans | 6.091 | 2014 | |
| 77 | Jose De Paula | 6.189 | 2014 | |
| 78 | Andrew Quezada# | 6.249 | 2022 | |
| 79 | Bryan Hudson# | 6.335 | 2021 | |
| 80 | MD Johnson# | 6.734 | 2025 | |
| 81 | Tyler Gagnon | 6.766 | 2015 | |
| 82 | James Needy | 6.781 | 2014 | |
| 83 | Jimmy Joyce# | 6.926 | 2025 | |
| 84 | Jeff Lindgren# | 7.000 | 2025 |
