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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Luke Scrimger# | 0.48 | 2023 | |
| 2 | William Deel# | 0.67 | 2023 | |
| 2 | Oscar Malave# | 0.67 | 2018 | |
| 4 | Andy Waring# | 0.69 | 2022 | |
| 4 | Adam D'Alberto# | 0.69 | 2020 | |
| 4 | Joe Hart# | 0.69 | 2015 | |
| 7 | Corey Gruver# | 0.70 | 2010 | |
| 8 | Joe Hart# | 0.71 | 2024 | |
| 9 | Iliana Preciado | 0.72 | 2005 | |
| 9 | Mike Nave | 0.72 | 2014 | |
| 11 | Evan Pullman# | 0.73 | 2022 | |
| 11 | Felipe Gonzalez | 0.73 | 2016 | |
| 13 | Brian Prince# | 0.74 | 2016 | |
| 14 | Rodrigo Lemus# | 0.76 | 2016 | |
| 15 | Pat Payne | 0.78 | 2011 | |
| 15 | Tom Kitko | 0.78 | 2021 | |
| 15 | Johnny Keener# | 0.78 | 2017 | |
| 18 | Bill Flowers# | 0.79 | 2012 | |
| 18 | Sean Bartol | 0.79 | 2006 | |
| 20 | Paul Ledford* | 0.80 | 2008 | |
| 20 | Corey Gruver# | 0.80 | 2014 | |
| 22 | Chris Mattison | 0.81 | 2014 | |
| 22 | Jorge Valdez | 0.81 | 2010 | |
| 24 | Yosaburo Kanda | 0.83 | 2014 | |
| 24 | Heriberto Milan | 0.83 | 2010 | |
| 24 | Joe Hart# | 0.83 | 2022 | |
| 27 | Bill Vasquez | 0.84 | 2008 | |
| 27 | Nate Briceno# | 0.84 | 2015 | |
| 29 | Josh Flaten# | 0.87 | 2015 | |
| 29 | Cody Morosko | 0.87 | 2001 | |
| 29 | Jordan Clarke | 0.87 | 2008 | |
| 32 | Adam D'Alberto# | 0.88 | 2022 | |
| 32 | Nick Slover# | 0.88 | 2024 | |
| 34 | Eric Burdine* | 0.89 | 2002 | |
| 34 | Kyle Ziegler | 0.89 | 2005 | |
| 34 | Jason Hollenbeck# | 0.89 | 2022 | |
| 37 | Antonio Higuera# | 0.90 | 2019 | |
| 37 | Albert Fabian# | 0.90 | 2020 | |
| 37 | Johnny Keener# | 0.90 | 2018 | |
| 37 | Bill Vasquez | 0.90 | 2003 | |
| 41 | Ben O'Halloran# | 0.93 | 2018 | |
| 41 | Paul Ledford* | 0.93 | 2005 | |
| 41 | Greg Sandlin# | 0.93 | 2013 | |
| 44 | Andy Dooley# | 0.94 | 2021 | |
| 45 | Andy Weatherholt# | 0.95 | 2021 | |
| 45 | Gordie Clifford# | 0.95 | 2019 | |
| 47 | Adam Farmer | 0.96 | 2005 | |
| 47 | Zachary Christman# | 0.96 | 2018 | |
| 47 | Jonathan Luna | 0.96 | 2009 | |
| 47 | William Deel# | 0.96 | 2024 | |
| 51 | Heriberto Milan | 0.97 | 2011 | |
| 51 | Rodolfo Soto# | 0.97 | 2015 | |
| 51 | Juan Mendoza# | 0.97 | 2021 | |
| 54 | Justin Jemison# | 0.98 | 2019 | |
| 54 | Rodrigo Lemus# | 0.98 | 2017 | |
| 54 | Ron Baumgardner | 0.98 | 2012 | |
| 57 | Alfredo Tiscareno# | 0.99 | 2018 | |
| 57 | Rodrigo Lemus# | 0.99 | 2020 | |
| 59 | Logan Stone | 1.00 | 2016 | |
| 59 | Julian Rangel | 1.00 | 2016 | |
| 59 | Emmanuel Mendoza | 1.00 | 2013 | |
| 59 | Sean Stevens# | 1.00 | 2023 | |
| 59 | Oscar Martinez | 1.00 | 2003 | |
| 59 | Jorge Lopez | 1.00 | 2006 | |
| 59 | Du-sung Moon | 1.00 | 2008 | |
| 59 | Tom Franzoni* | 1.00 | 2005 | |
| 59 | Vance Adams | 1.00 | 2008 | |
| 59 | Kory Tourville# | 1.00 | 2019 | |
| 59 | John Way# | 1.00 | 2019 | |
| 70 | Felipe Ayala# | 1.02 | 2018 | |
| 70 | Omar Cons# | 1.02 | 2023 | |
| 72 | Joe Hart# | 1.03 | 2016 | |
| 72 | Sam Campos# | 1.03 | 2023 | |
| 72 | Marty Capone# | 1.03 | 2019 | |
| 72 | Miguel Isiordia | 1.03 | 2008 | |
| 72 | Paul Ledford* | 1.03 | 2009 | |
| 77 | Elard Nijhuis | 1.04 | 2006 | |
| 77 | Bill Flowers# | 1.04 | 2011 | |
| 77 | Adrian Radecki | 1.04 | 2013 | |
| 77 | Travis Gross | 1.04 | 2017 | |
| 77 | Xiang-ling Fei* | 1.04 | 2008 | |
| 82 | Paul Ledford* | 1.05 | 2012 | |
| 82 | Nate Briceno# | 1.05 | 2016 | |
| 82 | Chris McLure | 1.05 | 2008 | |
| 82 | Miguel Berrios# | 1.05 | 2019 | |
| 86 | Dan Miller# | 1.06 | 2019 | |
| 86 | Blake Barber | 1.06 | 2005 | |
| 86 | Jody Fouse# | 1.06 | 2017 | |
| 86 | Chris Mattison | 1.06 | 2013 | |
| 90 | Jonathan Roten# | 1.07 | 2018 | |
| 90 | Geremia Farinelli | 1.07 | 2000 | |
| 90 | Alejandro Marquina | 1.07 | 2013 | |
| 90 | Eric Burdine* | 1.07 | 2011 | |
| 94 | Jonathan Allen# | 1.08 | 2020 | |
| 94 | David Edgemon# | 1.08 | 2023 | |
| 94 | Pat Payne | 1.08 | 2014 | |
| 94 | Aaron Sutton | 1.08 | 2012 | |
| 98 | Antonio Higuera# | 1.09 | 2009 | |
| 98 | Phil Gregoire# | 1.09 | 2016 | |
| 98 | Pat Hovhannisian# | 1.09 | 2016 |
