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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 | 2012-2020 | |
| 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 | Dan Mills# | 0.99 | 2014-2021 | |
| 14 | Paul Ledford* | 1.00 | 2000-2013 | |
| 14 | Brian Prince# | 1.00 | 2011-2020 | |
| 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 | Joe Hart# | 1.07 | 2013-2021 | |
| 23 | Jose Rodriguez | 1.08 | 2000-2016 | |
| 23 | Chris Frost# | 1.08 | 2011-2020 | |
| 23 | Jordan Clarke# | 1.08 | 2004-2020 | |
| 26 | Vance Adams | 1.09 | 2000-2013 | |
| 26 | Hethum Manasarian# | 1.09 | 2001-2020 | |
| 26 | Miguel Berrios# | 1.09 | 2018-2021 | |
| 29 | Aaron Sutton# | 1.10 | 2009-2021 | |
| 29 | Casey Abbott# | 1.10 | 2009-2021 | |
| 29 | Bill Vasquez | 1.10 | 2000-2012 | |
| 32 | Rodrigo Lemus# | 1.11 | 2013-2021 | |
| 33 | Adam Farmer | 1.12 | 2000-2009 | |
| 33 | Stephen Stride# | 1.12 | 2011-2020 | |
| 33 | Marty Capone# | 1.12 | 2019-2021 | |
| 36 | Antonio Higuera# | 1.13 | 2007-2021 | |
| 36 | Adrian Radecki# | 1.13 | 2012-2019 | |
| 36 | Scott Schowalter# | 1.13 | 2012-2020 | |
| 39 | Geremia Farinelli | 1.14 | 2000-2014 | |
| 40 | Josh Flaten# | 1.15 | 2015-2021 | |
| 40 | Pat Payne# | 1.15 | 2009-2020 | |
| 40 | Gordie Clifford# | 1.15 | 2013-2021 | |
| 40 | Justin Jemison# | 1.15 | 2019-2021 | |
| 40 | Santos Martinez | 1.15 | 2000-2012 | |
| 40 | Zachary Christman# | 1.15 | 2014-2021 | |
| 40 | Logan Stone# | 1.15 | 2010-2020 | |
| 47 | Albert Fabian# | 1.16 | 2014-2021 | |
| 47 | Travis Thurber# | 1.16 | 2005-2021 | |
| 47 | Corey Gruver# | 1.16 | 2006-2021 | |
| 47 | Austin Bauer | 1.16 | 2005-2014 | |
| 51 | Brad Hower# | 1.17 | 2010-2020 | |
| 51 | Chris McLure | 1.17 | 2000-2010 | |
| 51 | Felipe Ayala# | 1.17 | 2013-2021 | |
| 51 | Elard Nijhuis | 1.17 | 2000-2009 | |
| 55 | Alfredo Tiscareno# | 1.18 | 2010-2021 | |
| 55 | Pat Hovhannisian# | 1.18 | 2014-2021 | |
| 55 | Greg Sandlin# | 1.18 | 2009-2021 | |
| 58 | Noah George | 1.19 | 2005-2017 | |
| 58 | Chris Johnson | 1.19 | 2007-2018 | |
| 58 | Bill Flowers# | 1.19 | 2011-2021 | |
| 58 | Blake Barber | 1.19 | 2000-2007 | |
| 62 | Chris Harris# | 1.20 | 2007-2020 | |
| 63 | Alejandro Marquina | 1.21 | 2002-2016 | |
| 63 | Jorge Lopez | 1.21 | 2004-2013 | |
| 65 | Tom Kitko# | 1.22 | 2012-2020 | |
| 65 | Du-sung Moon | 1.22 | 2002-2015 | |
| 67 | Hector Moralez# | 1.23 | 2011-2019 | |
| 68 | Xiang-ling Fei* | 1.24 | 2000-2012 | |
| 68 | Daishin Uchida | 1.24 | 2008-2016 | |
| 70 | Eric Burdine | 1.25 | 2000-2017 | |
| 70 | Carlos Mendez# | 1.25 | 2011-2021 | |
| 72 | Phil Gregoire# | 1.27 | 2013-2021 | |
| 72 | Josh Shute | 1.27 | 2013-2018 | |
| 72 | Kory Tourville# | 1.27 | 2014-2021 | |
| 75 | David Nations | 1.28 | 2000-2008 | |
| 75 | Rodolfo Soto# | 1.28 | 2015-2021 | |
| 75 | Matt Schmid# | 1.28 | 2013-2020 | |
| 78 | Miguel Isiordia | 1.29 | 2003-2012 | |
| 78 | Jack Ivory# | 1.29 | 2018-2021 | |
| 78 | Cody Morosko | 1.29 | 2000-2010 | |
| 81 | Seth Dann | 1.30 | 2002-2013 | |
| 81 | Iliana Preciado | 1.30 | 2000-2009 | |
| 81 | Miguel Soto# | 1.30 | 2013-2021 | |
| 84 | Kyle Ziegler | 1.32 | 2000-2011 | |
| 84 | Ben O'Halloran# | 1.32 | 2016-2021 | |
| 84 | Chris Bentley# | 1.32 | 2008-2020 | |
| 87 | Yosaburo Kanda# | 1.33 | 2013-2020 | |
| 87 | Ron Baumgardner | 1.33 | 2010-2019 | |
| 87 | Jonathan Allen# | 1.33 | 2016-2021 | |
| 87 | Aubert Rebellin | 1.33 | 2009-2014 | |
| 87 | Carlos Garcia | 1.33 | 2000-2014 | |
| 92 | Chad Landreth | 1.34 | 2001-2017 | |
| 93 | Justin Fielding | 1.35 | 2000-2013 | |
| 93 | Jonathan Luna | 1.35 | 2000-2011 | |
| 93 | Justin Turbeville | 1.35 | 2008-2018 | |
| 96 | Roberto Salazar# | 1.36 | 2013-2021 | |
| 96 | Jose Moreno | 1.36 | 2000-2014 | |
| 98 | Sukeaki Kato | 1.38 | 2001-2014 | |
| 99 | Damien Haling | 1.40 | 2000-2011 | |
| 100 | Tyrone Hairston | 1.43 | 2002-2013 |
