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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Sean Cofield | 1.05 | 2011-2021 | |
| 1 | Kyle Connell# | 1.05 | 2015-2025 | |
| 3 | Jonathan Parker | 1.07 | 2011-2022 | |
| 4 | Cameron Outlaw# | 1.09 | 2015-2025 | |
| 5 | Tom Rise# | 1.12 | 2015-2024 | |
| 5 | Chris Marquis# | 1.12 | 2018-2025 | |
| 7 | Andy Jackson | 1.13 | 2005-2013 | |
| 7 | Nick Kline | 1.13 | 2007-2023 | |
| 7 | Chris Pickens | 1.13 | 2005-2013 | |
| 10 | Brian Gann | 1.14 | 2000-2013 | |
| 10 | Federico Gonzalez | 1.14 | 2000-2009 | |
| 12 | Enrique Perez | 1.16 | 2009-2017 | |
| 12 | Nate Briceno# | 1.16 | 2014-2025 | |
| 12 | Justin Baker# | 1.16 | 2015-2025 | |
| 15 | Rick Winkler# | 1.17 | 2017-2024 | |
| 15 | Gerardo Lozano | 1.17 | 2014-2021 | |
| 17 | Matt Beard | 1.18 | 2000-2013 | |
| 17 | Nelson Martinez# | 1.18 | 2011-2023 | |
| 19 | Jon Caruso | 1.19 | 2004-2013 | |
| 20 | Jim Patrick | 1.20 | 2000-2011 | |
| 20 | Mauricio Martinez | 1.20 | 2015-2024 | |
| 22 | Santiago Rodas | 1.21 | 2000-2010 | |
| 22 | Adam Arnett | 1.21 | 2000-2009 | |
| 24 | Josh Bass# | 1.22 | 2014-2025 | |
| 24 | Luis Alcoser | 1.22 | 2005-2022 | |
| 24 | Justin Steach | 1.22 | 2004-2014 | |
| 27 | Cameron Brown | 1.23 | 2011-2018 | |
| 27 | Justin Messer | 1.23 | 2000-2012 | |
| 27 | Jeremy Excell | 1.23 | 2000-2012 | |
| 30 | Aaron Harrison | 1.24 | 2000-2010 | |
| 31 | Jesus Quintero | 1.25 | 2000-2009 | |
| 31 | Terry Droubay# | 1.25 | 2017-2025 | |
| 31 | Fred Muse | 1.25 | 2000-2012 | |
| 31 | Brad Goodman | 1.25 | 2012-2021 | |
| 35 | Don Sheffield | 1.26 | 2000-2011 | |
| 35 | Gabe Vincent | 1.26 | 2012-2023 | |
| 35 | Brian Yates | 1.26 | 2003-2012 | |
| 35 | Josh Adams | 1.26 | 2000-2014 | |
| 35 | Chris Auger | 1.26 | 2000-2009 | |
| 40 | Jose Estrada | 1.27 | 2000-2010 | |
| 40 | Isaiah Robinson# | 1.27 | 2018-2025 | |
| 40 | Mike Felder | 1.27 | 2004-2014 | |
| 43 | Logan Johns | 1.28 | 2002-2011 | |
| 43 | Jonathan Lung | 1.28 | 2000-2011 | |
| 43 | Dan Hagen | 1.28 | 2002-2013 | |
| 43 | Nick Giese | 1.28 | 2000-2009 | |
| 47 | Ian Starcher | 1.29 | 2000-2012 | |
| 47 | Markus Mensink | 1.29 | 2000-2008 | |
| 47 | Will Moore | 1.29 | 2000-2009 | |
| 50 | Billy Merner# | 1.30 | 2015-2025 | |
| 50 | Jonathan McMahon | 1.30 | 2001-2009 | |
| 50 | Morgan Thompson | 1.30 | 2005-2014 | |
| 53 | Tadanori Kawasaki | 1.31 | 2005-2014 | |
| 53 | Andy McCullough | 1.31 | 2000-2014 | |
| 55 | Sean Prevost | 1.32 | 2005-2014 | |
| 55 | Bruce Hernandez | 1.32 | 2000-2008 | |
| 57 | Matt McPeak | 1.33 | 2000-2006 | |
| 57 | Arturo Jimenez | 1.33 | 2003-2013 | |
| 57 | Ramon Sandoval | 1.33 | 2000-2009 | |
| 60 | Brad Parish | 1.34 | 2000-2008 | |
| 60 | Edgar Gonzalez | 1.34 | 2000-2009 | |
| 60 | Ryan Hester | 1.34 | 2001-2011 | |
| 63 | Tyler Byrd | 1.35 | 2000-2011 | |
| 64 | Matt Taub | 1.36 | 2005-2016 | |
| 65 | Alan Sweet | 1.39 | 2000-2009 | |
| 66 | C.J. Mejia | 1.40 | 2011-2019 | |
| 67 | Brian Zubia | 1.42 | 2008-2015 | |
| 68 | Dave Vilca | 1.43 | 2000-2007 | |
| 69 | Mike Henken | 1.44 | 2001-2011 | |
| 70 | Tom Schauman | 1.48 | 2003-2010 |
