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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | K9 | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Gilberto Martínez# | 13.89 | 2025-2031 | |
| 2 | Archie Esparza# | 12.98 | 2025-2031 | |
| 3 | Paul Hale# | 12.04 | 2020-2031 | |
| 4 | Mo Sanford | 11.89 | 1991-2005 | |
| 5 | Terrell Wade | 11.71 | 1995-2010 | |
| 6 | Dellin Betances | 11.63 | 2012-2028 | |
| 7 | David Robertson | 11.49 | 2011-2023 | |
| 8 | Kerry Wood | 11.09 | 1998-2007 | |
| 9 | Randy D Johnson | 10.85 | 1988-2003 | |
| 10 | Rick Snow# | 10.82 | 2026-2031 | |
| 11 | Jorge Enríquez# | 10.68 | 2020-2031 | |
| 12 | Bill Gill# | 10.50 | 2023-2031 | |
| 13 | Nathan Whalebelly | 10.34 | 2015-2029 | |
| 14 | Joe Sparks | 10.03 | 2007-2019 | |
| 15 | James Ryan# | 9.97 | 2017-2027 | |
| 16 | Rick Ankiel | 9.83 | 1999-2015 | |
| 17 | Wilford Chambers* | 9.78 | 2006-2025 | |
| 18 | Vicente Maldonado# | 9.73 | 2025-2031 | |
| 19 | Bob Jenkins* | 9.56 | 2008-2023 | |
| 20 | Victor Moret | 9.52 | 2003-2016 | |
| 20 | Ronald Moyer# | 9.52 | 2023-2031 | |
| 22 | Kevin Pryor | 9.51 | 2012-2023 | |
| 23 | George Sherrill | 9.43 | 2005-2021 | |
| 24 | Hideo Nomo | 9.39 | 1995-2003 | |
| 25 | Heath Bell | 9.36 | 2004-2021 | |
| 26 | José Torres# | 9.35 | 2026-2031 | |
| 27 | Ugueth Urbina | 9.33 | 1995-2013 | |
| 28 | Matt Beech | 9.30 | 1996-2005 | |
| 29 | Daron Maddox | 9.29 | 2015-2027 | |
| 29 | Pedro J Martinez | 9.29 | 1992-2007 | |
| 31 | Scott Kazmir | 9.28 | 2004-2019 | |
| 32 | Felipe Herrera# | 9.27 | 2021-2031 | |
| 33 | Juan Velázquez# | 9.25 | 2025-2031 | |
| 34 | Roger Clemens* | 9.24 | 1984-2006 | |
| 35 | Mark Prior* | 9.22 | 2002-2016 | |
| 35 | Santiago Herrera | 9.22 | 2000-2018 | |
| 37 | Juan Hernández# | 9.17 | 2018-2030 | |
| 38 | Jake McGee | 9.16 | 2015-2023 | |
| 39 | Brad Lidge | 9.13 | 2002-2017 | |
| 40 | Héctor Bernal# | 9.12 | 2024-2031 | |
| 41 | Eduard Fotachi# | 9.06 | 2019-2031 | |
| 42 | Manuel Vázquez# | 9.05 | 2024-2031 | |
| 43 | Victor Dunlap | 9.04 | 2010-2020 | |
| 44 | Clarence Burch# | 9.00 | 2023-2031 | |
| 45 | Tito Smith# | 8.97 | 2020-2031 | |
| 46 | Jesús Enríquez | 8.93 | 2001-2015 | |
| 47 | Rafael Betancourt | 8.86 | 2004-2019 | |
| 48 | Austin Willis | 8.83 | 2018-2027 | |
| 49 | Kevin Lynch# | 8.80 | 2021-2029 | |
| 50 | Scott Sanders | 8.75 | 1993-2007 | |
| 50 | Raúl Aguilar# | 8.75 | 2020-2031 | |
| 52 | Miguel Moreno# | 8.72 | 2020-2031 | |
| 53 | Shelby Miller | 8.69 | 2016-2027 | |
| 54 | Stephen Strasburg | 8.68 | 2011-2027 | |
| 55 | Kelvim Escobar | 8.64 | 1997-2018 | |
| 56 | William Pierce# | 8.60 | 2025-2031 | |
| 56 | Cam Herb | 8.60 | 2009-2017 | |
| 56 | Gabe Johnson | 8.60 | 2019-2028 | |
| 56 | Dave Pownall | 8.60 | 2014-2027 | |
| 60 | Dan Woods# | 8.59 | 2023-2031 | |
| 60 | Will Terry | 8.59 | 2014-2025 | |
| 62 | Chet Humphrey | 8.58 | 2002-2011 | |
| 63 | Dwight Tucker | 8.57 | 2011-2027 | |
| 64 | Ebby Calvin LaLoosh | 8.54 | 2007-2018 | |
| 65 | Greg Keagle | 8.53 | 1996-2006 | |
| 66 | Tony Saunders | 8.51 | 1997-2012 | |
| 66 | Javier Vazquez* | 8.51 | 1998-2013 | |
| 68 | David Bailey | 8.47 | 2020-2028 | |
| 69 | Gregory Burke | 8.45 | 2002-2013 | |
| 70 | Juan Guzman* | 8.44 | 1991-2005 | |
| 71 | Jeff Shoemaker# | 8.40 | 2025-2031 | |
| 72 | Pedro López# | 8.39 | 2019-2031 | |
| 73 | Máximo Sánchez | 8.36 | 2015-2025 | |
| 74 | Cole Hamels* | 8.33 | 2007-2023 | |
| 75 | Ryan Dempster | 8.32 | 1999-2007 | |
| 75 | Kyle Jones | 8.32 | 2016-2025 | |
| 77 | Gary Lefebvre | 8.31 | 2002-2016 | |
| 78 | Johan Santana | 8.29 | 2000-2015 | |
| 79 | Wade Miller | 8.22 | 1999-2012 | |
| 79 | Jeff Juden | 8.22 | 1991-2009 | |
| 81 | Sergio Guerrero# | 8.21 | 2023-2031 | |
| 82 | Carlos Jiménez# | 8.19 | 2021-2031 | |
| 83 | Dorian Bunch# | 8.18 | 2022-2031 | |
| 83 | Julian Owen# | 8.18 | 2021-2031 | |
| 85 | Allen Bailey | 8.16 | 2011-2023 | |
| 86 | Brian Wilson | 8.15 | 2007-2021 | |
| 86 | Jacob deGrom# | 8.15 | 2022-2031 | |
| 88 | Dan Wilkerson# | 8.12 | 2023-2031 | |
| 89 | Chip Blake# | 8.11 | 2022-2030 | |
| 90 | Steve Watts | 8.10 | 2008-2021 | |
| 91 | Carlos Trinidad | 8.09 | 2003-2013 | |
| 92 | Jarrod Schmidt | 8.04 | 2018-2028 | |
| 93 | Steve Mills# | 8.02 | 2024-2031 | |
| 94 | Jermaine Perkins | 7.97 | 2015-2027 | |
| 94 | Carlos Zambrano | 7.97 | 2001-2019 | |
| 96 | Michael Hood | 7.91 | 2002-2013 | |
| 97 | Dennis Kirby | 7.90 | 2010-2022 | |
| 98 | Avery Webb# | 7.87 | 2018-2025 | |
| 98 | Gerrit Cole# | 7.87 | 2022-2031 | |
| 98 | Neal Peterson# | 7.87 | 2021-2028 |
