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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | B9 | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Ronald Moyer# | 0.36 | 2018 | |
| 2 | Ronald Moyer# | 0.40 | 2017 | |
| 3 | Juan Martínez | 0.45 | 2005 | |
| 4 | Bill Gill# | 0.49 | 2018 | |
| 5 | Joakim Soria | 0.53 | 2004 | |
| 6 | George Burke# | 0.55 | 2013 | |
| 6 | Felix Hernandez | 0.55 | 2004 | |
| 8 | Anibal Sanchez | 0.57 | 2005 | |
| 9 | George Burke# | 0.59 | 2011 | |
| 10 | José Pérez | 0.62 | 2004 | |
| 11 | Roland Gates | 0.67 | 2007 | |
| 11 | George Burke# | 0.67 | 2012 | |
| 13 | Clayton Kershaw | 0.79 | 2008 | |
| 14 | Craig O'Brien# | 0.84 | 2020 | |
| 14 | Johnny Cueto | 0.84 | 2007 | |
| 14 | Elvis Lambert | 0.84 | 2006 | |
| 17 | Jake McGee | 0.85 | 2009 | |
| 18 | Lee Flowers | 0.86 | 2009 | |
| 19 | Steve White | 0.90 | 2009 | |
| 19 | George Burke# | 0.90 | 2014 | |
| 21 | Dave Bennett | 0.93 | 2013 | |
| 22 | Bob Dudley# | 0.94 | 2020 | |
| 23 | Ronald Moyer# | 0.95 | 2016 | |
| 23 | Dan Hunt | 0.95 | 2007 | |
| 23 | Ben Parks# | 0.95 | 2014 | |
| 26 | Charlie Martin | 0.96 | 2013 | |
| 26 | Roland Gates | 0.96 | 2006 | |
| 28 | Elton Anderson | 0.99 | 2006 | |
| 28 | Hae-young Kim# | 0.99 | 2019 | |
| 30 | Clayton Kershaw | 1.03 | 2009 | |
| 31 | Gilbert Carson | 1.04 | 2004 | |
| 32 | Dave French | 1.05 | 2013 | |
| 33 | Ron Ryan | 1.06 | 2013 | |
| 34 | Herman Kramer | 1.07 | 2013 | |
| 34 | Johnny Cueto | 1.07 | 2006 | |
| 34 | Donald Lewis# | 1.07 | 2014 | |
| 37 | Bill Gill# | 1.08 | 2017 | |
| 37 | Zijadin Xhumba# | 1.08 | 2021 | |
| 39 | Thom Parker# | 1.09 | 2015 | |
| 39 | Roland Gates | 1.09 | 2008 | |
| 41 | Nathan Whalebelly | 1.10 | 2009 | |
| 42 | Enrique Martínez# | 1.11 | 2023 | |
| 42 | Casey Janssen | 1.11 | 2008 | |
| 42 | Bill Moore# | 1.11 | 2013 | |
| 45 | Ángel López# | 1.12 | 2023 | |
| 46 | Matt Lucas# | 1.13 | 2015 | |
| 47 | Rhys Trude# | 1.14 | 2023 | |
| 47 | Julio Teheran | 1.14 | 2007 | |
| 49 | Mark Butler | 1.15 | 2013 | |
| 50 | Steve Hewer | 1.16 | 2005 | |
| 50 | Steve White | 1.16 | 2010 | |
| 52 | Rob Abbotson# | 1.17 | 2013 | |
| 52 | Andrew Davis | 1.17 | 2009 | |
| 52 | Elvis Lambert | 1.17 | 2008 | |
| 52 | Scott Mahoney# | 1.17 | 2018 | |
| 52 | Tom Coughlans | 1.17 | 2004 | |
| 57 | José Gonzáles | 1.18 | 2013 | |
| 57 | Miguel Escobedo# | 1.18 | 2031 | |
| 59 | Dave French | 1.19 | 2014 | |
| 59 | Elvis Lambert | 1.19 | 2007 | |
| 61 | Carlton Lockridge | 1.20 | 2015 | |
| 62 | Adam Yates | 1.21 | 2021 | |
| 62 | Bill Gill# | 1.21 | 2016 | |
| 62 | Craig Zimmerman# | 1.21 | 2017 | |
| 65 | Luis López# | 1.22 | 2023 | |
| 66 | Richard Perkins# | 1.23 | 2023 | |
| 66 | Pedro Castillo# | 1.23 | 2023 | |
| 68 | Adam Meade# | 1.24 | 2017 | |
| 68 | Steven Wilson# | 1.24 | 2022 | |
| 68 | Jon Niese | 1.24 | 2008 | |
| 68 | Colin Akers | 1.24 | 2013 | |
| 68 | William Turner | 1.24 | 2021 | |
| 68 | Kevin Willis# | 1.24 | 2015 | |
| 74 | Héctor Luján# | 1.25 | 2014 | |
| 75 | Felipe Sánchez | 1.26 | 2014 | |
| 75 | Emílio Rosas# | 1.26 | 2016 | |
| 77 | Mark Butler | 1.27 | 2015 | |
| 77 | Dave French | 1.27 | 2015 | |
| 77 | José Villarreal# | 1.27 | 2024 | |
| 77 | Jack Leiter# | 1.27 | 2021 | |
| 81 | Jason Porter# | 1.28 | 2023 | |
| 81 | Kennet Bijl# | 1.28 | 2023 | |
| 83 | Jason Cummings# | 1.29 | 2019 | |
| 83 | Kyung-wan Park# | 1.29 | 2022 | |
| 83 | Bradley Robinson# | 1.29 | 2015 | |
| 83 | Neal Bowers# | 1.29 | 2015 | |
| 83 | Curt Hayes | 1.29 | 2005 | |
| 88 | Alex Cobb | 1.30 | 2008 | |
| 88 | Edward Villalobos# | 1.30 | 2018 | |
| 90 | Ken Holland# | 1.31 | 2021 | |
| 90 | Mike Allen# | 1.31 | 2024 | |
| 92 | Neal Bowers# | 1.32 | 2014 | |
| 93 | Adam Wainwright | 1.33 | 2004 | |
| 93 | Jason Cummings# | 1.33 | 2020 | |
| 95 | Homer Bailey | 1.34 | 2006 | |
| 95 | José Cruz# | 1.34 | 2023 | |
| 95 | Carlos Morales# | 1.34 | 2023 | |
| 95 | Mike King# | 1.34 | 2017 | |
| 95 | Kevin Smith# | 1.34 | 2020 | |
| 95 | Bob Frazier# | 1.34 | 2014 |
