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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Jacob Degrom# | 0.000 | 2021 | |
| 2 | Sandy Koufax | 0.375 | 1965 | |
| 3 | Timothy Shibuya | 0.551 | 2012 | |
| 4 | Martin Perez# | 0.587 | 2015 | |
| 5 | Jacob Degrom# | 0.600 | 2017 | |
| 6 | Josh Smoker | 0.844 | 2012 | |
| 7 | Max Scherzer# | 0.915 | 2013 | |
| 8 | Lance McCullers Jr.# | 0.931 | 2019 | |
| 9 | Justin Wilson | 1.059 | 2018 | |
| 9 | Josh Osich | 1.059 | 2012 | |
| 11 | Yu Darvish# | 1.125 | 2018 | |
| 12 | Grant Dayton | 1.200 | 2021 | |
| 13 | Mat Latos | 1.213 | 2015 | |
| 14 | Aaron Nola# | 1.246 | 2021 | |
| 14 | Maikel Cleto | 1.246 | 2012 | |
| 14 | Shohei Ohtani# | 1.246 | 2020 | |
| 17 | Gerrit Cole# | 1.333 | 2017 | |
| 18 | Lance McCullers Jr.# | 1.350 | 2021 | |
| 19 | Justin Souza | 1.406 | 2012 | |
| 20 | Madison Bumgarner | 1.486 | 2018 | |
| 21 | Sandy Koufax | 1.500 | 1963 | |
| 22 | Jose Quintana# | 1.607 | 2018 | |
| 23 | C.J. Wilson | 1.688 | 2014 | |
| 24 | Matt Andriese | 1.723 | 2012 | |
| 25 | Jeurys Familia | 1.742 | 2012 | |
| 26 | Corey Kluber | 1.761 | 2016 | |
| 27 | Lisalberto Bonilla | 1.770 | 2012 | |
| 28 | Matt Manning# | 1.776 | 2022 | |
| 29 | Luis Castillo# | 1.800 | 2023 | |
| 29 | Carlos Carrasco | 1.800 | 2016 | |
| 29 | Chris Jones | 1.800 | 2012 | |
| 29 | Kendry Flores | 1.800 | 2019 | |
| 33 | Catfish Hunter | 1.820 | 1973 | |
| 34 | Christian Friedrich | 1.841 | 2011 | |
| 35 | Jeurys Familia | 1.875 | 2011 | |
| 36 | Adam Wainwright | 1.884 | 2017 | |
| 37 | Justin Masterson | 1.895 | 2013 | |
| 38 | Kyle Hendricks# | 1.906 | 2022 | |
| 39 | Blake Snell# | 1.976 | 2022 | |
| 40 | Justin Steele# | 2.000 | 2024 | |
| 41 | Catfish Hunter | 2.011 | 1972 | |
| 42 | Jeremy Hellickson | 2.015 | 2014 | |
| 43 | Jon Niese | 2.054 | 2014 | |
| 44 | Stephen Strasburg# | 2.182 | 2015 | |
| 45 | Collin McHugh | 2.213 | 2016 | |
| 46 | Carlos Carrasco | 2.224 | 2021 | |
| 46 | Jose Junior Rosario | 2.224 | 2012 | |
| 48 | Erik Davis | 2.250 | 2012 | |
| 48 | Lance McCullers Jr.# | 2.250 | 2017 | |
| 48 | Shawn Armstrong# | 2.250 | 2012 | |
| 51 | Jake Odorizzi | 2.328 | 2016 | |
| 52 | Charlie Shirek | 2.348 | 2011 | |
| 52 | Matt Crouse | 2.348 | 2012 | |
| 54 | Patrick Sandoval# | 2.362 | 2022 | |
| 55 | Merrill Kelly# | 2.368 | 2024 | |
| 55 | Matt Moore# | 2.368 | 2014 | |
| 57 | Jeff Ames | 2.382 | 2012 | |
| 58 | Andrew Cashner | 2.411 | 2013 | |
| 59 | Walker Buehler# | 2.455 | 2020 | |
| 59 | Nathan Eovaldi# | 2.455 | 2022 | |
| 61 | Kodai Senga# | 2.492 | 2023 | |
| 62 | Nick Martinez# | 2.531 | 2024 | |
| 62 | Corbin Burnes# | 2.531 | 2024 | |
| 64 | Wade Davis | 2.541 | 2013 | |
| 65 | Ryan Pressley | 2.547 | 2012 | |
| 66 | Jacob Degrom# | 2.571 | 2024 | |
| 67 | Carlos Carrasco | 2.589 | 2019 | |
| 68 | Miguel Celestino | 2.602 | 2012 | |
| 69 | Shane McClanahan# | 2.613 | 2023 | |
| 70 | Johnny Cueto | 2.656 | 2021 | |
| 71 | Nick Anderson# | 2.935 | 2020 | |
| 72 | Justin Verlander# | 2.953 | 2020 | |
| 73 | Homer Bailey | 2.967 | 2016 | |
| 74 | Edgar Ibarra | 3.000 | 2011 | |
| 75 | Gio Gonzalez | 3.057 | 2014 | |
| 76 | Chris Archer | 3.098 | 2019 | |
| 77 | Aaron Nola# | 3.115 | 2017 | |
| 77 | Justin Verlander# | 3.115 | 2015 | |
| 79 | Corbin Burnes# | 3.130 | 2023 | |
| 80 | Yu Darvish# | 3.146 | 2013 | |
| 81 | Zach Plesac# | 3.240 | 2021 | |
| 82 | Catfish Hunter | 3.259 | 1974 | |
| 83 | David Price | 3.411 | 2016 | |
| 84 | Corey Kluber | 3.447 | 2017 | |
| 85 | Gerrit Cole# | 3.536 | 2018 | |
| 86 | Matthew Boyd# | 3.574 | 2021 | |
| 87 | Clayton Kershaw# | 3.586 | 2015 | |
| 88 | Freddy Peralta# | 3.600 | 2021 | |
| 89 | Justin Verlander# | 3.661 | 2014 | |
| 89 | Chad Bettis | 3.661 | 2012 | |
| 91 | Tyler Mahle# | 3.682 | 2021 | |
| 92 | Tyler Mahle# | 3.706 | 2018 | |
| 93 | Carlos Frias | 3.738 | 2012 | |
| 94 | Ross Detwiler | 3.857 | 2013 | |
| 94 | Edinson Volquez | 3.857 | 2014 | |
| 96 | Miles Mikolas# | 3.913 | 2021 | |
| 96 | Marcus Stroman# | 3.913 | 2017 | |
| 98 | Catfish Hunter | 3.919 | 1976 | |
| 99 | Max Scherzer# | 3.938 | 2018 | |
| 100 | Shohei Ohtani# | 3.971 | 2023 |
