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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | H9 | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Chris Jones | 3.30 | 2010-2012 | |
| 2 | Kyle Hendricks# | 4.58 | 2016-2024 | |
| 3 | Justin Souza | 4.78 | 2012-2012 | |
| 4 | Jacob Degrom# | 5.49 | 2012-2025 | |
| 5 | Jon Niese | 5.58 | 2009-2016 | |
| 6 | Sandy Koufax | 5.68 | 1955-1966 | |
| 7 | Craig Kimbrel# | 6.00 | 2011-2025 | |
| 7 | Mat Latos | 6.00 | 2010-2016 | |
| 9 | Lance McCullers Jr.# | 6.13 | 2016-2025 | |
| 10 | Corbin Burnes# | 6.18 | 2020-2025 | |
| 11 | Dellin Betances | 6.31 | 2011-2021 | |
| 12 | Yu Darvish# | 6.46 | 2012-2025 | |
| 13 | Merrill Kelly# | 6.55 | 2019-2024 | |
| 14 | Stephen Strasburg# | 6.61 | 2010-2025 | |
| 15 | Blake Snell# | 6.70 | 2012-2025 | |
| 16 | Shane McClanahan# | 6.88 | 2023-2025 | |
| 17 | Michael Pineda | 7.16 | 2011-2023 | |
| 18 | Madison Bumgarner | 7.19 | 2011-2023 | |
| 19 | Catfish Hunter | 7.27 | 1965-1976 | |
| 19 | Derek Holland | 7.27 | 2010-2019 | |
| 21 | Max Scherzer# | 7.29 | 2009-2025 | |
| 21 | Homer Bailey | 7.29 | 2009-2020 | |
| 21 | Freddy Peralta# | 7.29 | 2019-2025 | |
| 24 | Chad Bettis | 7.36 | 2012-2019 | |
| 25 | Cole Hamels | 7.39 | 2007-2022 | |
| 26 | Justin Verlander# | 7.40 | 2007-2025 | |
| 27 | Chris Archer | 7.41 | 2012-2023 | |
| 28 | Nathan Eovaldi# | 7.47 | 2012-2025 | |
| 29 | Shohei Ohtani# | 7.55 | 2018-2025 | |
| 30 | Zack Wheeler# | 7.61 | 2010-2025 | |
| 31 | Jake Odorizzi | 7.69 | 2012-2023 | |
| 32 | Carlos Carrasco | 7.85 | 2010-2023 | |
| 33 | Charlie Morton# | 7.94 | 2010-2025 | |
| 34 | Edinson Volquez | 7.99 | 2008-2020 | |
| 35 | Gerrit Cole# | 8.07 | 2012-2025 | |
| 36 | Gio Gonzalez | 8.15 | 2010-2022 | |
| 37 | Trevor Bauer | 8.22 | 2012-2023 | |
| 38 | Walker Buehler# | 8.24 | 2019-2025 | |
| 39 | Pablo Lopez# | 8.31 | 2021-2025 | |
| 40 | Wade Davis | 8.36 | 2009-2020 | |
| 41 | Ryan Pressley | 8.54 | 2010-2012 | |
| 42 | Dylan Cease# | 8.62 | 2015-2025 | |
| 42 | German Marquez# | 8.62 | 2018-2025 | |
| 44 | Clayton Kershaw# | 8.64 | 2009-2025 | |
| 45 | Jeurys Familia | 8.66 | 2010-2022 | |
| 46 | Johnny Cueto | 8.82 | 2010-2023 | |
| 46 | David Price | 8.82 | 2009-2023 | |
| 48 | Jose Quintana# | 8.86 | 2013-2025 | |
| 49 | Tyler Mahle# | 8.89 | 2017-2025 | |
| 50 | Ross Detwiler | 8.90 | 2011-2023 | |
| 51 | Adam Wainwright | 9.05 | 2004-2023 | |
| 52 | Carlos Rodon# | 9.11 | 2015-2025 | |
| 53 | Hyun-Jin Ryu | 9.25 | 2013-2023 | |
| 54 | Marcus Stroman# | 9.30 | 2015-2024 | |
| 55 | Smith Smith | 9.34 | 2004-2017 | |
| 55 | Aaron Nola# | 9.34 | 2015-2025 | |
| 57 | Matt Moore# | 9.38 | 2012-2025 | |
| 58 | Corey Kluber | 9.83 | 2011-2023 | |
| 59 | Miles Mikolas# | 10.80 | 2010-2025 | |
| 60 | Matthew Boyd# | 11.15 | 2019-2025 | |
| 61 | Jaime Garcia | 11.41 | 2011-2017 | |
| 62 | Logan Webb# | 11.57 | 2015-2025 | |
| 63 | Julio Urias# | 12.76 | 2018-2023 |
