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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Terry Droubay# | 1.033 | 2015 | |
| 2 | Bennett Anders | 1.200 | 2006 | |
| 3 | Javier Ramos | 1.258 | 2011 | |
| 3 | Justin Hesley# | 1.258 | 2023 | |
| 5 | Johnathon Zuber | 1.320 | 2013 | |
| 6 | Jose Fabian | 1.356 | 2006 | |
| 7 | Juan Lopez | 1.556 | 2010 | |
| 8 | David Edgemon# | 1.592 | 2019 | |
| 9 | Joe St. Clair | 1.633 | 2005 | |
| 10 | Joe Hart# | 1.636 | 2012 | |
| 11 | Macho Orneles | 1.639 | 2015 | |
| 12 | Ricky Guadalupe | 1.658 | 2009 | |
| 13 | Arturo Alvarado# | 1.662 | 2022 | |
| 14 | Adrian Elder | 1.664 | 2008 | |
| 15 | Jason Keller | 1.665 | 2014 | |
| 16 | Danny Solorza | 1.688 | 2006 | |
| 17 | Dane Terry | 1.713 | 2012 | |
| 18 | Skyler Corey | 1.721 | 2010 | |
| 19 | Gary Hogan | 1.723 | 2007 | |
| 20 | Luis Cuadra | 1.742 | 2012 | |
| 21 | Miguel Rubio | 1.755 | 2006 | |
| 22 | Oscar Orduno# | 1.767 | 2020 | |
| 23 | Jonathan Lovo | 1.780 | 2001 | |
| 24 | Kyle Chamberlin | 1.793 | 2014 | |
| 25 | Jack Mendel | 1.844 | 2006 | |
| 26 | Brian Underwood# | 1.864 | 2021 | |
| 27 | Lorenzo Hernandez | 1.884 | 2010 | |
| 28 | Rich Elliott | 1.912 | 2005 | |
| 29 | David Pruner | 1.913 | 2012 | |
| 29 | Jonathan Marquina | 1.913 | 2011 | |
| 31 | Nick Sullivan | 1.921 | 2006 | |
| 32 | Sean Hickey | 1.953 | 2006 | |
| 33 | David Hernandez# | 1.956 | 2023 | |
| 34 | Rodrigo Izquierdo# | 1.957 | 2018 | |
| 35 | Justin Baker# | 1.966 | 2012 | |
| 35 | Chris Maldonado | 1.966 | 2005 | |
| 37 | Jordan Sanchez | 1.968 | 2009 | |
| 38 | Toshimichi Miyakawa | 2.004 | 2014 | |
| 38 | Justin Arias | 2.004 | 2012 | |
| 40 | Ken Neil | 2.031 | 2011 | |
| 41 | John Pyles | 2.032 | 2016 | |
| 42 | Bill Torres | 2.033 | 2005 | |
| 43 | Ryan Simpson# | 2.053 | 2012 | |
| 44 | Rick Collins# | 2.056 | 2019 | |
| 45 | Chris Maldonado | 2.087 | 2003 | |
| 46 | Danny Medina | 2.093 | 2009 | |
| 47 | Terry Jernegan | 2.096 | 2002 | |
| 48 | Jorge Rebollar | 2.108 | 2009 | |
| 49 | Rob McKinnie | 2.113 | 2011 | |
| 50 | Jake Youkilis | 2.122 | 2005 | |
| 51 | John Johnson | 2.129 | 2009 | |
| 52 | Ramon Juarez | 2.150 | 2013 | |
| 53 | Marco Carranza | 2.170 | 2009 | |
| 54 | Craig Conkin | 2.179 | 2008 | |
| 55 | Jerry Bowman# | 2.186 | 2019 | |
| 56 | Jarrod Monck | 2.189 | 2014 | |
| 57 | Ray Dappen# | 2.205 | 2019 | |
| 58 | James Taylor | 2.215 | 2005 | |
| 58 | Billy Westcott# | 2.215 | 2016 | |
| 60 | Simon Young | 2.221 | 2008 | |
| 61 | Daniel Vargas | 2.234 | 2005 | |
| 62 | Joel Pena | 2.239 | 2011 | |
| 63 | Eddie Aguilar | 2.242 | 2006 | |
| 64 | Dustin Patton# | 2.265 | 2022 | |
| 65 | Jake Miles | 2.271 | 2005 | |
| 66 | Mike Blume | 2.292 | 2009 | |
| 67 | John Bush | 2.311 | 2011 | |
| 68 | David Pruner | 2.324 | 2011 | |
| 69 | Ryan Warren# | 2.325 | 2014 | |
| 70 | Larry Weese# | 2.327 | 2023 | |
| 71 | Jorge Chavez | 2.328 | 2017 | |
| 72 | Humberto Quintana | 2.333 | 2006 | |
| 73 | Justin Belrose | 2.338 | 2002 | |
| 74 | B.J. Rudolph# | 2.342 | 2019 | |
| 75 | Juan Cabera | 2.344 | 2005 | |
| 76 | Graham Renner# | 2.361 | 2023 | |
| 77 | Diego Cortes | 2.364 | 2017 | |
| 78 | Jason Strobel# | 2.368 | 2013 | |
| 78 | Ramiro Solis# | 2.368 | 2026 | |
| 80 | Mike Coursen | 2.370 | 2008 | |
| 81 | Jeff Mitchell | 2.379 | 2015 | |
| 81 | Ernie de la Puente | 2.379 | 2015 | |
| 83 | Ryan Carnes | 2.392 | 2006 | |
| 84 | Adam Monnier | 2.395 | 2006 | |
| 85 | Jose Navarro | 2.398 | 2011 | |
| 86 | Kyle Sanchez | 2.400 | 2009 | |
| 87 | Antonio Durazo | 2.413 | 2003 | |
| 88 | Nate Sciallo | 2.415 | 2005 | |
| 89 | Pete Marcovecchio | 2.420 | 2009 | |
| 90 | Mike DeRocher | 2.423 | 2012 | |
| 91 | Evan Pullman# | 2.426 | 2018 | |
| 92 | Dustin Jones | 2.432 | 2015 | |
| 92 | Trent Brodie | 2.432 | 2006 | |
| 94 | Tony Nazario | 2.443 | 2011 | |
| 94 | Willis Rosario | 2.443 | 2005 | |
| 96 | Cory Gregerson# | 2.455 | 2012 | |
| 96 | Matt Schmid# | 2.455 | 2011 | |
| 98 | Chris Verellen# | 2.464 | 2013 | |
| 99 | Jermaine Strange | 2.465 | 2009 | |
| 100 | Dave Gutierrez | 2.466 | 2010 |
