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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Timothy Vallejo* | 0.97 | 2005-2023 | |
| 2 | Junior Cuomo* | 0.99 | 2004-2023 | |
| 3 | Ronald Placencia* | 1.01 | 2009-2023 | |
| 4 | Toyoshige Takahashi# | 1.04 | 2025-2035 | |
| 4 | Pat Carmichael# | 1.04 | 2023-2035 | |
| 6 | Chad Nelligan* | 1.05 | 2004-2016 | |
| 7 | Demarcus Ramirez* | 1.06 | 2002-2018 | |
| 8 | Juan Morrales | 1.09 | 2018-2023 | |
| 8 | Juan Villatoro* | 1.09 | 2009-2026 | |
| 10 | Thomas Cohen | 1.10 | 2010-2019 | |
| 11 | Albert Garcia | 1.11 | 2002-2012 | |
| 12 | Michael Leach# | 1.13 | 2031-2035 | |
| 13 | Richard Pimental | 1.14 | 2002-2014 | |
| 13 | Chris Williams# | 1.14 | 2027-2035 | |
| 13 | Craig Barmore | 1.14 | 2002-2006 | |
| 13 | Bill Siple | 1.14 | 2002-2012 | |
| 17 | Luis Diaz | 1.15 | 2002-2010 | |
| 18 | Steven Jurgens | 1.16 | 2002-2008 | |
| 18 | Jorge Reyes# | 1.16 | 2030-2035 | |
| 20 | Christopher Hester* | 1.17 | 2008-2025 | |
| 20 | Troy Nelson | 1.17 | 2002-2010 | |
| 20 | Steven White | 1.17 | 2002-2008 | |
| 20 | Casey Plunk | 1.17 | 2002-2011 | |
| 24 | Alberto Carballo | 1.18 | 2009-2015 | |
| 25 | Bill Clark | 1.19 | 2002-2009 | |
| 25 | Nicolas Vargas | 1.19 | 2014-2028 | |
| 25 | Wendell Sorg | 1.19 | 2002-2011 | |
| 28 | Joong-geun Yi# | 1.20 | 2026-2035 | |
| 28 | Ed Scull | 1.20 | 2003-2018 | |
| 30 | Eric Setliff | 1.21 | 2002-2011 | |
| 30 | Fernando Estrada | 1.21 | 2010-2026 | |
| 30 | Ernest Metcalf# | 1.21 | 2022-2035 | |
| 33 | Sherman Wheeler | 1.22 | 2004-2015 | |
| 33 | Scott Mayhew | 1.22 | 2002-2008 | |
| 33 | John Okane* | 1.22 | 2003-2022 | |
| 33 | Mark Deschamp | 1.22 | 2002-2013 | |
| 33 | Ernest Delamora | 1.22 | 2002-2008 | |
| 33 | Dalton Davis | 1.22 | 2008-2024 | |
| 39 | José Montáñez# | 1.23 | 2025-2035 | |
| 39 | Enrico Hernández | 1.23 | 2018-2032 | |
| 39 | Harold Gregory# | 1.23 | 2030-2035 | |
| 42 | Joshua Giddings | 1.24 | 2010-2017 | |
| 42 | Hobert Hagerty | 1.24 | 2002-2008 | |
| 42 | Ronald Adorno | 1.24 | 2009-2021 | |
| 42 | Frank Caroll | 1.24 | 2002-2014 | |
| 46 | William Brooks# | 1.25 | 2028-2035 | |
| 46 | Ronald Kirkwood | 1.25 | 2002-2011 | |
| 46 | Jim Walton | 1.25 | 2021-2034 | |
| 49 | Peter Bird | 1.26 | 2002-2012 | |
| 49 | Jim Knowles# | 1.26 | 2023-2035 | |
| 49 | William Augustin | 1.26 | 2002-2013 | |
| 49 | Jake Glenn# | 1.26 | 2029-2035 | |
| 49 | Willie Sewell | 1.26 | 2005-2018 | |
| 49 | Ferdinand Pineda | 1.26 | 2013-2020 | |
| 49 | Jonathan Starner | 1.26 | 2002-2011 | |
| 56 | Sabas Delvalle | 1.27 | 2007-2016 | |
| 56 | Isaac Diehl | 1.27 | 2009-2020 | |
| 56 | Erik Moore# | 1.27 | 2023-2035 | |
| 56 | Tian-bai Chen# | 1.27 | 2024-2035 | |
| 56 | Joshua Stoker | 1.27 | 2013-2032 | |
| 56 | Charles Midgett | 1.27 | 2002-2013 | |
| 62 | Roberto Olivas | 1.28 | 2002-2011 | |
| 62 | Hubert Bustillos | 1.28 | 2002-2011 | |
| 62 | Donald Dinwiddie | 1.28 | 2006-2019 | |
| 62 | Juan Ramírez# | 1.28 | 2025-2035 | |
| 62 | Derek Hanson# | 1.28 | 2026-2035 | |
| 67 | Deandre Desrosiers | 1.29 | 2002-2009 | |
| 67 | Kendrick Kaler | 1.29 | 2014-2020 | |
| 67 | Lawrence Floyd# | 1.29 | 2029-2035 | |
| 67 | Fredrick Thomas | 1.29 | 2011-2018 | |
| 67 | Bruno Talamantez | 1.29 | 2014-2031 | |
| 67 | Pedro Ramos | 1.29 | 2006-2023 | |
| 73 | Yorikane Kichikawa# | 1.30 | 2024-2035 | |
| 73 | Greg Jenkins# | 1.30 | 2025-2035 | |
| 73 | Emílio Romero | 1.30 | 2019-2029 | |
| 73 | Albert Boll | 1.30 | 2002-2013 | |
| 77 | Juan Santiago# | 1.31 | 2028-2035 | |
| 77 | Roy Watts | 1.31 | 2027-2034 | |
| 79 | Dave Klein# | 1.32 | 2022-2035 | |
| 79 | Patrick Beene# | 1.32 | 2021-2035 | |
| 79 | Jeffrey Shuttleworth | 1.32 | 2004-2022 | |
| 79 | Joseph Macaluso | 1.32 | 2011-2027 | |
| 79 | Tahachirou Shinsaku | 1.32 | 2006-2011 | |
| 79 | Jose Delagarza | 1.32 | 2003-2012 | |
| 79 | Joe Daye | 1.32 | 2002-2012 | |
| 79 | Miguel Archuleta# | 1.32 | 2027-2034 | |
| 87 | Kieran Rose# | 1.33 | 2027-2035 | |
| 87 | Juan Guerrera | 1.33 | 2015-2032 | |
| 87 | Kevin Kepner | 1.33 | 2015-2031 | |
| 87 | James Turner | 1.33 | 2010-2025 | |
| 87 | Dario Lopez | 1.33 | 2010-2023 | |
| 92 | Ernesto Arguelles | 1.34 | 2003-2011 | |
| 92 | Alejandro Báez# | 1.34 | 2028-2035 | |
| 92 | Dennis Durand | 1.34 | 2012-2025 | |
| 92 | David Alcala | 1.34 | 2009-2017 | |
| 92 | Bill Dewall | 1.34 | 2009-2024 | |
| 92 | Bradford Mcgreevy | 1.34 | 2007-2015 | |
| 92 | Hector Orozco | 1.34 | 2007-2020 | |
| 92 | Earle Stollings | 1.34 | 2002-2011 | |
| 92 | James Cropper | 1.34 | 2010-2021 |
