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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Chris Allen | 2.465 | 2022 | |
| 2 | David Sosebee | 2.466 | 2018 | |
| 3 | Kolton Ingram# | 2.726 | 2020 | |
| 4 | Javier Rivera# | 2.948 | 2024 | |
| 5 | Kevin Abel# | 3.027 | 2022 | |
| 6 | Tyler Garbee# | 3.073 | 2021 | |
| 7 | Jacob Voss | 3.176 | 2021 | |
| 8 | Drake Fellows# | 3.214 | 2024 | |
| 9 | Niall Windeler# | 3.333 | 2021 | |
| 10 | Brock Burke# | 3.362 | 2018 | |
| 11 | Reid VanScoter# | 3.447 | 2023 | |
| 12 | David Hurlbut | 3.593 | 2019 | |
| 13 | Markus Solbach | 3.608 | 2017 | |
| 14 | Cody Kurz | 3.682 | 2015 | |
| 15 | Reggie Meyer | 3.756 | 2020 | |
| 16 | Jake Simon | 3.764 | 2018 | |
| 17 | Javier Reynoso | 3.782 | 2021 | |
| 18 | Chris Murphy | 4.039 | 2017 | |
| 19 | Kyle Jones# | 4.080 | 2023 | |
| 20 | Julian Aguiar# | 4.098 | 2023 | |
| 21 | Craig Missigman | 4.103 | 2014 | |
| 22 | Nate Savino# | 4.111 | 2023 | |
| 23 | Josh Rogers# | 4.169 | 2018 | |
| 24 | Darrien Williams | 4.208 | 2021 | |
| 25 | Ryan Newell | 4.245 | 2017 | |
| 26 | Juan Bautista | 4.257 | 2017 | |
| 27 | Chris Flexen# | 4.282 | 2014 | |
| 28 | Logan Boyd | 4.337 | 2017 | |
| 29 | Kevin Coulter | 4.358 | 2021 | |
| 30 | Hunter Wells | 4.371 | 2018 | |
| 31 | Brock Dykxhoorn | 4.372 | 2020 | |
| 32 | Jose Berrios# | 4.424 | 2013 | |
| 33 | Keenan Kish | 4.480 | 2017 | |
| 34 | Ryne Inman | 4.520 | 2021 | |
| 35 | Thatcher Hurd# | 4.706 | 2025 | |
| 36 | A.J. Franklin | 4.716 | 2020 | |
| 36 | Alberto Tirado | 4.716 | 2014 | |
| 38 | Cody Laweryson# | 4.725 | 2020 | |
| 39 | Jake Stevenson | 4.737 | 2021 | |
| 40 | Drake Owenby | 4.741 | 2017 | |
| 41 | Brett Gerritse | 4.745 | 2013 | |
| 42 | Bradley Brehmer# | 4.850 | 2024 | |
| 43 | Bryan Brickhouse | 4.909 | 2013 | |
| 43 | Edwin Diaz# | 4.909 | 2015 | |
| 45 | Steven Gallardo | 4.991 | 2015 | |
| 46 | Roel Ramirez | 5.069 | 2017 | |
| 47 | Jose Lopez | 5.087 | 2017 | |
| 48 | Matt Kent | 5.172 | 2017 | |
| 49 | Trey Pooser# | 5.274 | 2025 | |
| 50 | Nick Lee | 5.304 | 2013 | |
| 51 | Garrett Corthright | 5.326 | 2014 | |
| 52 | Wilsen Palacios | 5.400 | 2014 | |
| 52 | M.T. Minacci | 5.400 | 2017 | |
| 52 | Carter Hope# | 5.400 | 2016 | |
| 55 | Drew Finley | 5.445 | 2017 | |
| 56 | Zach Quintana | 5.513 | 2014 | |
| 57 | Mike Clevinger# | 5.541 | 2014 | |
| 58 | Patrick Copen# | 5.630 | 2025 | |
| 59 | Edwin Diaz# | 5.657 | 2014 | |
| 60 | Adrian Houser# | 5.718 | 2014 | |
| 61 | Charlie Barnes# | 5.777 | 2018 | |
| 62 | Myles Smith | 5.821 | 2014 | |
| 63 | Radhames Quezada | 5.921 | 2013 | |
| 64 | Eudis Idrogo | 5.938 | 2017 | |
| 65 | Chih-Wei Hu | 5.972 | 2014 | |
| 66 | Joey Cantillo# | 6.013 | 2018 | |
| 67 | Trevor Lubking | 6.081 | 2017 | |
| 68 | Keegan Thompson# | 6.085 | 2018 | |
| 69 | J.D. Underwood | 6.160 | 2014 | |
| 70 | Pat Light | 6.190 | 2015 | |
| 71 | Andres Galan# | 6.201 | 2025 | |
| 72 | Jordan Desguin | 6.231 | 2017 | |
| 73 | Alex Clemmey# | 6.241 | 2024 | |
| 74 | Pat Light | 6.248 | 2014 | |
| 75 | Hoby Milner# | 6.288 | 2013 | |
| 76 | Zachary Bird | 6.382 | 2014 | |
| 77 | Greg Harris | 6.405 | 2014 | |
| 78 | Jacob Dahlstrand | 6.465 | 2014 | |
| 79 | Steven Gallardo | 7.422 | 2016 | |
| 80 | Steven Gallardo | 7.637 | 2014 | |
| 81 | Frankie Montas# | 7.864 | 2013 | |
| 82 | Ryan Newell | 7.880 | 2014 | |
| 83 | Clinton Hollon | 8.068 | 2014 | |
| 84 | Zachary Bird | 8.178 | 2013 |
