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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Kyle Lohse | 1.05 | 2001-2014 | |
| 2 | Paul Williams | 1.08 | 2012-2026 | |
| 2 | Byron Guffin | 1.08 | 2010-2022 | |
| 4 | Mike Wood | 1.12 | 2005-2014 | |
| 5 | Brandon Lyon | 1.13 | 2001-2011 | |
| 6 | Tim Redding | 1.14 | 2001-2016 | |
| 7 | Chuck Smith | 1.15 | 2008-2016 | |
| 7 | Tony McKnight | 1.15 | 2000-2009 | |
| 7 | Keith Compton | 1.15 | 2002-2011 | |
| 7 | José Tañón | 1.15 | 2001-2011 | |
| 11 | Mike Bannon | 1.16 | 2003-2014 | |
| 12 | Dave Coggin | 1.17 | 2002-2010 | |
| 12 | Curt Cameron | 1.17 | 2000-2011 | |
| 12 | Jeremy Guthrie | 1.17 | 2006-2017 | |
| 12 | Nick Bradley | 1.17 | 2005-2011 | |
| 16 | Daisuke Matsuzaka | 1.18 | 2010-2023 | |
| 17 | Denny Bautista | 1.19 | 2005-2015 | |
| 17 | Gilbert Carson | 1.19 | 2008-2021 | |
| 17 | António González | 1.19 | 2007-2021 | |
| 17 | Mike Jordan | 1.19 | 2007-2014 | |
| 17 | Luis Marino | 1.19 | 2005-2012 | |
| 17 | Steve Hayes | 1.19 | 2014-2022 | |
| 23 | Phil Barnes | 1.20 | 2009-2020 | |
| 23 | Enrique Guerrero | 1.20 | 2006-2012 | |
| 23 | Dan Ainslie | 1.20 | 2016-2027 | |
| 23 | Jason Dickson | 1.20 | 1996-2006 | |
| 23 | Chris C George | 1.20 | 2001-2014 | |
| 23 | Leonardo Rodríguez | 1.20 | 2001-2013 | |
| 29 | Bob Anderson | 1.21 | 2009-2020 | |
| 29 | Adam Gilbert | 1.21 | 2011-2019 | |
| 29 | James Miller | 1.21 | 2016-2024 | |
| 29 | Haywood Horn | 1.21 | 2003-2015 | |
| 29 | Veríssimo Hervedeiro | 1.21 | 2004-2015 | |
| 29 | Javier Coronado | 1.21 | 2012-2020 | |
| 35 | Steven Holroyd | 1.22 | 2013-2027 | |
| 36 | Jerome Williams | 1.23 | 2003-2016 | |
| 37 | Scott Downs | 1.24 | 2000-2013 | |
| 37 | Floyd Johnston | 1.24 | 2005-2012 | |
| 37 | Héctor García | 1.24 | 2002-2011 | |
| 37 | Kyle Dawson | 1.24 | 2010-2017 | |
| 37 | Eduardo Ruíz | 1.24 | 2015-2025 | |
| 37 | Lee Rice | 1.24 | 2000-2009 | |
| 43 | Jason Johnson | 1.25 | 1997-2008 | |
| 43 | Alan Reynolds | 1.25 | 2000-2013 | |
| 43 | Bob Harper | 1.25 | 2011-2024 | |
| 43 | Sugita Shirai# | 1.25 | 2025-2030 | |
| 47 | P.J. Fortier | 1.26 | 2003-2012 | |
| 47 | Dan C Smith | 1.26 | 1999-2005 | |
| 49 | Dan Middleton | 1.27 | 2008-2018 | |
| 49 | Joey Wells | 1.27 | 2003-2011 | |
| 49 | Ken Smith | 1.27 | 2000-2006 | |
| 49 | Shawn Sedlacek | 1.27 | 2002-2014 | |
| 49 | Dan McAllister | 1.27 | 2016-2028 | |
| 49 | John Roper | 1.27 | 1994-2007 | |
| 49 | Blake Thompson | 1.27 | 2003-2009 | |
| 49 | Terry Duffy | 1.27 | 2009-2020 | |
| 57 | Glenn Grady | 1.28 | 2012-2021 | |
| 57 | Jaime Garza | 1.28 | 2002-2008 | |
| 57 | Ned Ames | 1.28 | 2012-2023 | |
| 57 | Matt Garza | 1.28 | 2008-2018 | |
| 61 | Larry Sherman | 1.29 | 2002-2010 | |
| 61 | Derek Duffy | 1.29 | 2002-2013 | |
| 61 | Joaquin Benoit | 1.29 | 2001-2012 | |
| 61 | Doug Ball | 1.29 | 2007-2021 | |
| 65 | George Burke# | 1.30 | 2017-2031 | |
| 65 | Luke Prokopec | 1.30 | 2000-2013 | |
| 65 | Armando Galarraga | 1.30 | 2009-2021 | |
| 65 | Willie Parker | 1.30 | 2003-2015 | |
| 65 | Cody Wade | 1.30 | 2009-2019 | |
| 65 | Mario Cruz | 1.30 | 2016-2027 | |
| 65 | Pablo Torres | 1.30 | 2000-2009 | |
| 65 | Ray Lucas | 1.30 | 2002-2011 | |
| 73 | Rob Patterson | 1.31 | 2002-2012 | |
| 73 | Steven Miller | 1.31 | 2018-2029 | |
| 73 | Scott Eyre | 1.31 | 1999-2008 | |
| 73 | Jim Parque | 1.31 | 1998-2010 | |
| 73 | Alfredo Guerrero | 1.31 | 2003-2012 | |
| 73 | Louis Hamel | 1.31 | 2000-2007 | |
| 73 | David Rodríguez | 1.31 | 2000-2009 | |
| 80 | Jeff Haley | 1.32 | 2007-2020 | |
| 80 | Jared Dawson | 1.32 | 2016-2024 | |
| 80 | James Shields | 1.32 | 2008-2019 | |
| 80 | Alfredo Aceves | 1.32 | 2014-2020 | |
| 84 | Denis Boucher | 1.33 | 1992-2003 | |
| 84 | Mitch Ward | 1.33 | 2009-2019 | |
| 84 | John Lannan | 1.33 | 2011-2020 | |
| 87 | Eric Brennan# | 1.34 | 2023-2031 | |
| 88 | Roger Salkeld | 1.35 | 1993-2006 | |
| 89 | Andrés Silva | 1.36 | 2014-2025 | |
| 90 | Frank Edwards | 1.37 | 2010-2022 | |
| 90 | Mike Leake | 1.37 | 2011-2024 | |
| 90 | Keith Bell | 1.37 | 2000-2012 | |
| 90 | Dave Adams# | 1.37 | 2022-2031 | |
| 90 | Markus Schmidt | 1.37 | 2003-2013 | |
| 90 | Ken Pittman | 1.37 | 2013-2024 | |
| 90 | Juan Rivera | 1.37 | 2002-2010 | |
| 90 | Sean Lee | 1.37 | 2012-2022 | |
| 98 | Norman Taylor# | 1.38 | 2022-2031 | |
| 98 | Paul Burke | 1.38 | 2017-2026 | |
| 98 | Jason Williams | 1.38 | 2014-2024 |
