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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Leonard Puckett | 1.598 | 2001-2007 | |
| 2 | Javier Carbajal | 2.419 | 2019-2030 | |
| 3 | Alfredo Molina | 2.535 | 2014-2018 | |
| 4 | Rick Goulding | 2.654 | 2045-2052 | |
| 5 | Héctor Velásquez | 2.862 | 2002-2005 | |
| 6 | Armando Jiménez | 2.998 | 2019-2024 | |
| 7 | Tommy Smith | 3.095 | 2018-2028 | |
| 8 | Nathan Turner | 3.109 | 2003-2008 | |
| 9 | Axel Rolland | 3.129 | 2013-2019 | |
| 10 | Gilberto Morales | 3.193 | 2023-2028 | |
| 11 | Mike Condorcet | 3.304 | 1997-2002 | |
| 12 | Marcos Márquez | 3.453 | 2020-2024 | |
| 13 | Eric Roy | 3.456 | 2031-2034 | |
| 14 | Koji Shini | 3.971 | 2001-2005 | |
| 15 | Steven Nelson | 4.092 | 1997-2000 | |
| 16 | Barend van Eck | 4.189 | 2029-2035 | |
| 17 | Jesús Coronado | 4.377 | 2017-2021 | |
| 18 | Simon Woollams | 6.660 | 2032-2033 |
