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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | K9 | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Kensaku Yamaguchi# | 13.384 | 2025 | |
| 2 | Kensaku Yamaguchi# | 11.278 | 2024 | |
| 3 | Julio Urias# | 10.638 | 2024 | |
| 4 | Michael Matuella# | 10.211 | 2024 | |
| 5 | Jesus Zambrano# | 10.176 | 2023 | |
| 6 | William Heflin# | 10.150 | 2025 | |
| 7 | Alex Reyes# | 10.120 | 2025 | |
| 8 | Alex Reyes# | 10.113 | 2024 | |
| 9 | Jose Fernandez# | 10.061 | 2016 | |
| 10 | Alex Reyes# | 9.876 | 2021 | |
| 11 | Alex Reyes# | 9.786 | 2023 | |
| 12 | Julio Teheran# | 9.668 | 2018 | |
| 13 | Julio Urias# | 9.626 | 2022 | |
| 14 | Roger Clemens# | 9.590 | 2021 | |
| 15 | Robby Stone# | 9.568 | 2024 | |
| 16 | Jackson Kowar# | 9.567 | 2025 | |
| 17 | Damien Magnifico# | 9.555 | 2021 | |
| 18 | Merandy Gonzalez# | 9.553 | 2024 | |
| 19 | Sandy Koufax# | 9.505 | 2023 | |
| 20 | Julio Urias# | 9.485 | 2025 | |
| 21 | Tyler Glasnow# | 9.484 | 2021 | |
| 22 | Shelby Miller# | 9.463 | 2024 | |
| 23 | Anthony Molina# | 9.459 | 2025 | |
| 24 | Ben Jordan# | 9.400 | 2024 | |
| 25 | Alex Reyes# | 9.389 | 2022 | |
| 26 | Michael Matuella# | 9.370 | 2025 | |
| 27 | Jackson Kowar# | 9.360 | 2021 | |
| 28 | Anthony Molina# | 9.355 | 2024 | |
| 29 | Jackson Kowar# | 9.351 | 2020 | |
| 30 | Jim Bartlett# | 9.337 | 2024 | |
| 31 | Jim Bartlett# | 9.326 | 2025 | |
| 32 | Robby Stone# | 9.247 | 2025 | |
| 33 | Julio Teheran# | 9.228 | 2025 | |
| 34 | Trevor Hillhouse# | 9.222 | 2024 | |
| 35 | César Valdés# | 9.211 | 2025 | |
| 36 | Sandy Koufax# | 9.206 | 2021 | |
| 37 | Nick Pratto# | 9.160 | 2025 | |
| 38 | Clayton Kershaw# | 9.138 | 2017 | |
| 39 | Clayton Kershaw# | 9.119 | 2020 | |
| 40 | Sandy Koufax# | 9.117 | 2024 | |
| 41 | Anthony Molina# | 9.105 | 2023 | |
| 42 | Adam Conley# | 9.079 | 2019 | |
| 43 | Grant Holmes# | 9.060 | 2025 | |
| 44 | Julio Urias# | 9.030 | 2023 | |
| 45 | Jackson Kowar# | 9.016 | 2022 | |
| 46 | Yu Darvish | 9.000 | 2015 | |
| 47 | Julio Teheran# | 8.985 | 2019 | |
| 48 | Damien Magnifico# | 8.969 | 2019 | |
| 49 | Clayton Kershaw# | 8.957 | 2022 | |
| 50 | Chris Sale# | 8.956 | 2016 | |
| 51 | Carlos Rodon# | 8.926 | 2019 | |
| 52 | Kolby Allard# | 8.891 | 2022 | |
| 53 | Sonny Gray# | 8.850 | 2015 | |
| 54 | Tyler Glasnow# | 8.823 | 2019 | |
| 55 | Stephen Strasburg | 8.810 | 2017 | |
| 56 | Sandy Koufax# | 8.808 | 2022 | |
| 57 | Madison Bumgarner# | 8.803 | 2021 | |
| 58 | Carlos Rodon# | 8.768 | 2024 | |
| 59 | Jose Fernandez# | 8.758 | 2018 | |
| 60 | Jose Fernandez# | 8.741 | 2015 | |
| 61 | Shelby Miller# | 8.737 | 2021 | |
| 62 | Nate Karns | 8.720 | 2016 | |
| 63 | Carlos Rodon# | 8.717 | 2023 | |
| 64 | Matt Wisler# | 8.711 | 2024 | |
| 65 | Henry Owens | 8.672 | 2017 | |
| 66 | Ryan Olson# | 8.652 | 2023 | |
| 67 | Adam Conley# | 8.650 | 2020 | |
| 68 | Stephen Keller# | 8.644 | 2022 | |
| 69 | Toby Kelly# | 8.636 | 2024 | |
| 70 | Madison Bumgarner# | 8.625 | 2015 | |
| 71 | Chris Sale# | 8.624 | 2015 | |
| 72 | Carlos Rodon# | 8.615 | 2020 | |
| 73 | Cody Poteet# | 8.601 | 2022 | |
| 74 | Noah Syndergaard# | 8.595 | 2016 | |
| 75 | Chris Sale# | 8.581 | 2021 | |
| 76 | Ethan Small# | 8.561 | 2025 | |
| 77 | Yordano Ventura# | 8.540 | 2017 | |
| 78 | Eduardo Rodriguez# | 8.526 | 2022 | |
| 79 | Stephen Strasburg | 8.520 | 2019 | |
| 80 | Nate Karns | 8.514 | 2020 | |
| 81 | Damien Magnifico# | 8.511 | 2022 | |
| 82 | Chad Hammond# | 8.510 | 2025 | |
| 83 | Tyler Glasnow# | 8.477 | 2020 | |
| 84 | Julio Teheran# | 8.465 | 2021 | |
| 85 | Noah Syndergaard# | 8.463 | 2017 | |
| 86 | Hunter Harvey# | 8.462 | 2020 | |
| 87 | Matt Wisler# | 8.458 | 2023 | |
| 88 | Shelby Miller# | 8.453 | 2016 | |
| 89 | Jose Fernandez# | 8.448 | 2019 | |
| 90 | Jeff Samardzija | 8.443 | 2018 | |
| 91 | Jeurys Familia | 8.441 | 2025 | |
| 92 | Hansel Rodriguez | 8.431 | 2024 | |
| 93 | Shelby Miller# | 8.428 | 2018 | |
| 94 | Shelby Miller# | 8.422 | 2022 | |
| 95 | Jose Fernandez# | 8.421 | 2020 | |
| 96 | Matt Wisler# | 8.414 | 2025 | |
| 97 | Robby Stone# | 8.413 | 2022 | |
| 98 | Trevor Hillhouse# | 8.397 | 2023 | |
| 99 | Grant Holmes# | 8.394 | 2024 | |
| 100 | Alex Wood# | 8.393 | 2022 |
