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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Rich Forbes# | 0.76 | 2013-2021 | |
| 2 | Corey Johnson | 0.81 | 2010-2020 | |
| 3 | Carlos Pardo# | 0.83 | 2012-2021 | |
| 4 | Nelson Cirilo | 0.85 | 2007-2014 | |
| 5 | Chris Mattison# | 0.87 | 2012-2019 | |
| 6 | Francisco Camacho | 0.95 | 2000-2013 | |
| 6 | Oreste Comollo | 0.95 | 2001-2014 | |
| 8 | Felipe Gonzalez# | 0.96 | 2011-2020 | |
| 8 | Oscar Martinez | 0.96 | 2000-2010 | |
| 8 | Sergio Martinez | 0.96 | 2005-2017 | |
| 8 | Johnny Keener# | 0.96 | 2015-2021 | |
| 12 | Brett Dorman | 0.97 | 2005-2019 | |
| 13 | Paul Ledford* | 1.00 | 2000-2013 | |
| 13 | Dan Miller# | 1.00 | 2018-2021 | |
| 13 | Brian Prince# | 1.00 | 2011-2021 | |
| 16 | Nate Briceno# | 1.02 | 2015-2020 | |
| 16 | Aubrey Morrison | 1.02 | 2000-2011 | |
| 18 | William Arredondo | 1.03 | 2000-2012 | |
| 19 | Heriberto Milan# | 1.04 | 2007-2021 | |
| 20 | Sean Bartol | 1.05 | 2000-2010 | |
| 20 | Hiromi Fukuda | 1.05 | 2006-2018 | |
| 22 | Tom Kitko# | 1.07 | 2012-2021 | |
| 22 | Gordie Clifford# | 1.07 | 2013-2021 | |
| 24 | Dan Mills# | 1.08 | 2014-2021 | |
| 24 | Jose Rodriguez* | 1.08 | 2000-2016 | |
| 24 | Chris Frost# | 1.08 | 2011-2021 | |
| 24 | Joe Hart# | 1.08 | 2013-2021 | |
| 24 | Jordan Clarke# | 1.08 | 2004-2021 | |
| 29 | Vance Adams | 1.09 | 2000-2013 | |
| 29 | Hethum Manasarian | 1.09 | 2001-2020 | |
| 29 | Miguel Berrios# | 1.09 | 2018-2021 | |
| 32 | Aaron Sutton | 1.10 | 2009-2021 | |
| 32 | Bill Vasquez | 1.10 | 2000-2012 | |
| 34 | Adam Farmer | 1.12 | 2000-2009 | |
| 34 | Stephen Stride# | 1.12 | 2011-2020 | |
| 34 | Corey Gruver# | 1.12 | 2006-2021 | |
| 34 | Marty Capone# | 1.12 | 2019-2021 | |
| 38 | Antonio Higuera# | 1.13 | 2007-2021 | |
| 38 | Adrian Radecki# | 1.13 | 2012-2019 | |
| 38 | Scott Schowalter# | 1.13 | 2012-2021 | |
| 41 | Rodrigo Lemus# | 1.14 | 2013-2021 | |
| 41 | Geremia Farinelli | 1.14 | 2000-2014 | |
| 41 | Brad Hower# | 1.14 | 2010-2021 | |
| 44 | Josh Flaten# | 1.15 | 2015-2021 | |
| 44 | Pat Payne# | 1.15 | 2009-2021 | |
| 44 | Justin Jemison# | 1.15 | 2019-2021 | |
| 44 | Santos Martinez | 1.15 | 2000-2012 | |
| 44 | Zachary Christman# | 1.15 | 2014-2021 | |
| 44 | Logan Stone# | 1.15 | 2010-2021 | |
| 50 | Albert Fabian# | 1.16 | 2014-2021 | |
| 50 | Travis Thurber# | 1.16 | 2005-2021 | |
| 50 | Austin Bauer | 1.16 | 2005-2014 | |
| 53 | Chris McLure | 1.17 | 2000-2010 | |
| 53 | Felipe Ayala# | 1.17 | 2013-2021 | |
| 53 | Elard Nijhuis | 1.17 | 2000-2009 | |
| 56 | Alfredo Tiscareno# | 1.18 | 2010-2021 | |
| 56 | Pat Hovhannisian# | 1.18 | 2014-2021 | |
| 56 | Greg Sandlin# | 1.18 | 2009-2021 | |
| 59 | Noah George | 1.19 | 2005-2017 | |
| 59 | Chris Johnson | 1.19 | 2007-2018 | |
| 59 | Bill Flowers# | 1.19 | 2011-2021 | |
| 59 | Blake Barber | 1.19 | 2000-2007 | |
| 63 | Chris Harris | 1.20 | 2007-2020 | |
| 64 | Alejandro Marquina | 1.21 | 2002-2016 | |
| 64 | Jorge Lopez | 1.21 | 2004-2013 | |
| 66 | Du-sung Moon | 1.22 | 2002-2015 | |
| 67 | Hector Moralez | 1.23 | 2011-2019 | |
| 68 | Xiang-ling Fei* | 1.24 | 2000-2012 | |
| 68 | Barry McLamb# | 1.24 | 2013-2021 | |
| 68 | Daishin Uchida | 1.24 | 2008-2016 | |
| 71 | Eric Burdine | 1.25 | 2000-2017 | |
| 71 | Casey Abbott# | 1.25 | 2009-2021 | |
| 73 | Kory Tourville# | 1.26 | 2014-2021 | |
| 74 | Phil Gregoire# | 1.27 | 2013-2021 | |
| 74 | Josh Shute | 1.27 | 2013-2018 | |
| 74 | Jonathan Allen# | 1.27 | 2016-2021 | |
| 77 | Rodolfo Soto# | 1.28 | 2015-2021 | |
| 77 | David Nations | 1.28 | 2000-2008 | |
| 77 | Matt Schmid# | 1.28 | 2013-2021 | |
| 80 | Roberto Salazar# | 1.29 | 2013-2021 | |
| 80 | Julian Bryant# | 1.29 | 2020-2021 | |
| 80 | Miguel Isiordia | 1.29 | 2003-2012 | |
| 80 | Cody Morosko | 1.29 | 2000-2010 | |
| 84 | Carlos Mendez# | 1.30 | 2011-2021 | |
| 84 | Seth Dann | 1.30 | 2002-2013 | |
| 84 | Iliana Preciado | 1.30 | 2000-2009 | |
| 84 | Jack Ivory# | 1.30 | 2018-2021 | |
| 88 | Kyle Ziegler | 1.32 | 2000-2011 | |
| 88 | Jon Haynes# | 1.32 | 2014-2021 | |
| 88 | Chris Bentley | 1.32 | 2008-2020 | |
| 91 | Yosaburo Kanda# | 1.33 | 2013-2021 | |
| 91 | Ron Baumgardner | 1.33 | 2010-2019 | |
| 91 | Aubert Rebellin | 1.33 | 2009-2014 | |
| 91 | Carlos Garcia | 1.33 | 2000-2014 | |
| 95 | Chad Landreth | 1.34 | 2001-2017 | |
| 96 | Justin Fielding | 1.35 | 2000-2013 | |
| 96 | Jonathan Luna | 1.35 | 2000-2011 | |
| 96 | Justin Turbeville | 1.35 | 2008-2018 | |
| 99 | Jose Moreno | 1.36 | 2000-2014 | |
| 100 | Miguel Soto# | 1.37 | 2013-2021 |
