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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | António Rodríguez | 0.92 | 2005-2009 | |
| 1 | Steve Hoffman* | 0.92 | 2006-2010 | |
| 3 | Fox Mulder | 0.93 | 2007-2012 | |
| 3 | Gary Harris | 0.93 | 2000-2003 | |
| 5 | Alejandro Ramos | 1.01 | 2011-2015 | |
| 6 | Marcos Sierra | 1.02 | 2006-2010 | |
| 7 | Alfred Childress# | 1.03 | 2052-2057 | |
| 7 | Clarence Murray | 1.03 | 1998-2001 | |
| 9 | Richard Mazzola | 1.04 | 2004-2008 | |
| 9 | Bobby Guthrington | 1.04 | 2011-2015 | |
| 11 | Juan Lucero | 1.08 | 2011-2015 | |
| 12 | Bill Rhodes | 1.09 | 2003-2007 | |
| 13 | Zach Bauer | 1.10 | 2003-2007 | |
| 14 | Miguel Rivera | 1.11 | 2001-2004 | |
| 14 | Julian Anderson | 1.11 | 2005-2009 | |
| 16 | Jesús Gonzáles | 1.13 | 2016-2020 | |
| 17 | Boyd Milicent | 1.14 | 2006-2010 | |
| 17 | Justin Alexander, Jr. | 1.14 | 2007-2011 | |
| 17 | Juan García# | 1.14 | 2053-2057 | |
| 20 | Luke Mayfield | 1.15 | 2005-2008 | |
| 20 | Josh Benez | 1.15 | 2004-2009 | |
| 22 | Jesús Aguirre | 1.16 | 2009-2013 | |
| 23 | José Aicón | 1.17 | 2005-2009 | |
| 24 | Yann Manfredi | 1.18 | 2005-2009 | |
| 25 | Grux King | 1.19 | 2005-2009 | |
| 25 | David West | 1.19 | 2006-2010 | |
| 27 | Trent Kirkpatrick# | 1.20 | 2052-2057 | |
| 28 | George Smith Patton | 1.24 | 2002-2006 | |
| 28 | Morris Brown | 1.24 | 1998-2001 | |
| 28 | Javier Alejo | 1.24 | 2000-2003 | |
| 28 | Cal Wilson | 1.24 | 2000-2003 | |
| 32 | Greg Wood | 1.25 | 2008-2012 | |
| 33 | Bret Carter | 1.28 | 2011-2015 | |
| 34 | Juan Flores | 1.29 | 2010-2014 | |
| 34 | Armando Vela# | 1.29 | 2052-2057 | |
| 34 | Scott Walker | 1.29 | 2009-2013 | |
| 34 | Bingo Long | 1.29 | 2010-2014 | |
| 38 | Richard Phillips | 1.30 | 2004-2008 | |
| 38 | Mike Hibbard | 1.30 | 2009-2013 | |
| 38 | Miguel Lara | 1.30 | 2011-2015 | |
| 41 | Pat Rice | 1.31 | 2004-2008 | |
| 41 | Juan Pineda# | 1.31 | 2052-2058 | |
| 41 | Uriah Colon | 1.31 | 2006-2010 | |
| 41 | Patrick O'Malley | 1.31 | 2007-2011 | |
| 45 | Jatinder Rajal | 1.34 | 2011-2015 | |
| 46 | Scot Dunn | 1.35 | 2006-2010 | |
| 46 | James Horton | 1.35 | 2003-2007 | |
| 48 | Juan Juárez | 1.36 | 2002-2005 | |
| 49 | Jason Taylor | 1.37 | 2007-2011 | |
| 50 | Ramón Scheffler# | 1.40 | 2052-2057 | |
| 51 | Jon Heard | 1.41 | 2014-2018 | |
| 51 | Claudio Núñez | 1.41 | 2008-2012 | |
| 53 | Henri Mignot# | 1.42 | 2052-2057 | |
| 53 | Stephen Young | 1.42 | 1998-2001 | |
| 55 | Archie Hudson | 1.43 | 2003-2007 | |
| 55 | Jay Arrington | 1.43 | 2005-2009 | |
| 55 | Bobby DePriest# | 1.43 | 2052-2057 | |
| 55 | Gabriel Chávez | 1.43 | 2003-2007 | |
| 59 | Darren Marshall | 1.44 | 2010-2014 | |
| 60 | Rafael Rivera | 1.47 | 2003-2007 | |
| 60 | Santiago Canales# | 1.47 | 2052-2057 | |
| 60 | Javier Soto | 1.47 | 2003-2007 | |
| 63 | Tony Riley | 1.49 | 2003-2007 | |
| 64 | Jaime Tonche | 1.50 | 2003-2007 | |
| 64 | Willis Wagner | 1.50 | 2004-2008 | |
| 66 | Daniel Bailey | 1.52 | 2001-2004 | |
| 66 | Manuel Guzmán | 1.52 | 2009-2013 | |
| 68 | Gill Frasquilho | 1.54 | 2004-2008 | |
| 69 | José Leyva | 1.59 | 2004-2008 | |
| 70 | José Cervantes | 1.61 | 2006-2010 |
