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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Cory Gearrin | 3.505 | 2013-2020 | |
| 2 | Eric Jokisch# | 3.973 | 2018-2023 | |
| 3 | Sal Romano# | 4.075 | 2017-2025 | |
| 4 | Cody Poteet# | 4.253 | 2019-2024 | |
| 5 | Carlos Rodon# | 4.272 | 2016-2019 | |
| 6 | Jeff Manship | 4.380 | 2013-2019 | |
| 7 | Cooper Criswell# | 4.467 | 2022-2025 | |
| 7 | Spenser Watkins# | 4.467 | 2022-2025 | |
| 9 | Tristan Beck# | 4.514 | 2021-2025 | |
| 10 | Brett Oberholtzer | 4.518 | 2013-2021 | |
| 10 | Matt Waldron# | 4.518 | 2022-2025 | |
| 12 | Christian Friedrich | 4.585 | 2014-2021 | |
| 13 | Ryan Weber | 4.589 | 2016-2023 | |
| 14 | Darren McCaughan# | 4.661 | 2022-2025 | |
| 15 | Blake Beavan | 4.682 | 2013-2018 | |
| 16 | Andrew Suarez# | 4.752 | 2018-2022 | |
| 17 | Tyler Gilbert# | 4.754 | 2022-2025 | |
| 18 | Tommy Romero# | 4.772 | 2022-2025 | |
| 19 | Joe Gunkel | 4.789 | 2018-2021 | |
| 20 | Jorge Lopez# | 4.822 | 2015-2020 | |
| 21 | Marcus Walden | 4.834 | 2015-2024 | |
| 22 | Javier Assad# | 4.859 | 2023-2025 | |
| 23 | Josh Fleming# | 4.902 | 2020-2025 | |
| 24 | Johan Oviedo# | 4.913 | 2021-2025 | |
| 25 | Kyle Weiland | 4.918 | 2013-2017 | |
| 26 | Alex White | 4.931 | 2013-2017 | |
| 27 | Nicholas Kingham | 4.961 | 2016-2022 | |
| 28 | Andre Rienzo | 4.979 | 2013-2016 | |
| 29 | Jake Thompson | 4.999 | 2016-2020 | |
| 30 | Sean Gilmartin | 5.012 | 2017-2023 | |
| 31 | Max Povse | 5.024 | 2018-2021 | |
| 32 | Glenn Sparkman | 5.072 | 2017-2023 | |
| 33 | Adrian Houser# | 5.089 | 2017-2025 | |
| 34 | Miguel A. Gonzalez | 5.092 | 2014-2018 | |
| 35 | Ty Blach# | 5.093 | 2014-2025 | |
| 36 | Austin Pruitt# | 5.098 | 2017-2024 | |
| 37 | Aaron Brooks# | 5.110 | 2015-2025 | |
| 38 | Alex Young# | 5.249 | 2017-2024 | |
| 39 | Tanner Roark | 5.274 | 2013-2016 | |
| 40 | Ryan Feierabend | 5.290 | 2011-2021 | |
| 41 | Chris Rusin | 5.347 | 2013-2015 | |
| 41 | Tyler Viza# | 5.347 | 2021-2025 | |
| 43 | Asher Wojciechowski | 5.443 | 2014-2024 | |
| 44 | Luis Mendoza | 5.457 | 2013-2018 | |
| 45 | Tyler Beede# | 5.699 | 2017-2025 | |
| 46 | Vidal Nuno | 5.782 | 2013-2020 | |
| 47 | Mickey Jannis | 5.823 | 2018-2022 | |
| 48 | Jerad Eickhoff | 5.922 | 2015-2021 | |
| 49 | Chris Hernandez | 6.187 | 2013-2016 | |
| 50 | Jon Moscot | 6.318 | 2015-2019 | |
| 51 | Rob Zastryzny# | 6.574 | 2018-2025 |
