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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Steve Hoffman* | 2.032 | 2006-2010 | |
| 2 | António Rodríguez | 2.075 | 2005-2009 | |
| 3 | Richard Mazzola | 2.143 | 2004-2008 | |
| 4 | Gary Harris | 2.449 | 2000-2003 | |
| 5 | Fox Mulder | 2.467 | 2007-2012 | |
| 6 | Alejandro Ramos | 2.625 | 2011-2015 | |
| 7 | Zach Bauer | 2.726 | 2003-2007 | |
| 8 | Alfred Childress# | 2.793 | 2052-2057 | |
| 9 | Julian Anderson | 2.810 | 2005-2009 | |
| 10 | Clarence Murray | 2.838 | 1998-2001 | |
| 11 | Juan García# | 2.850 | 2053-2057 | |
| 12 | George Smith Patton | 2.858 | 2002-2006 | |
| 13 | Marcos Sierra | 2.974 | 2006-2010 | |
| 14 | David West | 3.043 | 2006-2010 | |
| 15 | Juan Lucero | 3.044 | 2011-2015 | |
| 16 | Bobby Guthrington | 3.123 | 2011-2015 | |
| 17 | Miguel Rivera | 3.184 | 2001-2004 | |
| 18 | Jesús Gonzáles | 3.208 | 2016-2020 | |
| 19 | Luke Mayfield | 3.277 | 2005-2008 | |
| 20 | Morris Brown | 3.309 | 1998-2001 | |
| 21 | Miguel Lara | 3.362 | 2011-2015 | |
| 22 | Mike Hibbard | 3.394 | 2009-2013 | |
| 23 | Boyd Milicent | 3.437 | 2006-2010 | |
| 24 | Javier Alejo | 3.441 | 2000-2003 | |
| 25 | Scot Dunn | 3.445 | 2006-2010 | |
| 26 | Juan Pineda# | 3.453 | 2052-2058 | |
| 27 | Jesús Aguirre | 3.457 | 2009-2013 | |
| 28 | Grux King | 3.475 | 2005-2009 | |
| 29 | Bill Rhodes | 3.751 | 2003-2007 | |
| 30 | José Aicón | 3.850 | 2005-2009 | |
| 31 | Yann Manfredi | 3.865 | 2005-2009 | |
| 32 | Greg Wood | 3.907 | 2008-2012 | |
| 33 | Cal Wilson | 3.908 | 2000-2003 | |
| 34 | Justin Alexander, Jr. | 3.919 | 2007-2011 | |
| 35 | Trent Kirkpatrick# | 3.921 | 2052-2057 | |
| 36 | Armando Vela# | 3.942 | 2052-2057 | |
| 37 | Josh Benez | 3.999 | 2004-2009 | |
| 38 | Bret Carter | 4.015 | 2011-2015 | |
| 39 | Bingo Long | 4.079 | 2010-2014 | |
| 40 | Jay Arrington | 4.149 | 2005-2009 | |
| 41 | Jason Taylor | 4.158 | 2007-2011 | |
| 42 | Pat Rice | 4.178 | 2004-2008 | |
| 43 | Henri Mignot# | 4.194 | 2052-2057 | |
| 44 | Uriah Colon | 4.195 | 2006-2010 | |
| 45 | Scott Walker | 4.220 | 2009-2013 | |
| 46 | Patrick O'Malley | 4.235 | 2007-2011 | |
| 47 | Bobby DePriest# | 4.263 | 2052-2057 | |
| 48 | Jon Heard | 4.293 | 2014-2018 | |
| 49 | Stephen Young | 4.328 | 1998-2001 | |
| 50 | Ramón Scheffler# | 4.373 | 2052-2057 | |
| 51 | Santiago Canales# | 4.402 | 2052-2057 | |
| 52 | Javier Soto | 4.477 | 2003-2007 | |
| 53 | Gill Frasquilho | 4.486 | 2004-2008 | |
| 54 | Richard Phillips | 4.523 | 2004-2008 | |
| 55 | Jatinder Rajal | 4.532 | 2011-2015 | |
| 56 | Archie Hudson | 4.563 | 2003-2007 | |
| 57 | Juan Juárez | 4.827 | 2002-2005 | |
| 58 | Daniel Bailey | 4.878 | 2001-2004 | |
| 59 | Tony Riley | 4.899 | 2003-2007 | |
| 60 | Juan Flores | 4.909 | 2010-2014 | |
| 61 | Willis Wagner | 5.027 | 2004-2008 | |
| 62 | James Horton | 5.107 | 2003-2007 | |
| 63 | Darren Marshall | 5.123 | 2010-2014 | |
| 64 | Jaime Tonche | 5.145 | 2003-2007 | |
| 65 | Gabriel Chávez | 5.241 | 2003-2007 | |
| 66 | Claudio Núñez | 5.352 | 2008-2012 | |
| 67 | Manuel Guzmán | 5.359 | 2009-2013 | |
| 68 | José Leyva | 5.470 | 2004-2008 | |
| 69 | Rafael Rivera | 5.609 | 2003-2007 | |
| 70 | José Cervantes | 5.745 | 2006-2010 |
