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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | K9 | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Michael Kopech# | 9.88 | 2018 | |
| 2 | Spencer Arrighetti# | 9.69 | 2026 | |
| 3 | Marcus Stroman# | 9.46 | 2014 | |
| 4 | Brad Peacock | 9.08 | 2016 | |
| 5 | Brady Lail | 8.76 | 2016 | |
| 6 | Michael Knorr# | 8.60 | 2026 | |
| 7 | Jacob Turner | 8.53 | 2014 | |
| 8 | Zac Lowther# | 8.51 | 2023 | |
| 9 | Drew Rucinski# | 8.38 | 2026 | |
| 10 | Barret Loux | 8.31 | 2016 | |
| 11 | Austin Pruitt# | 8.29 | 2017 | |
| 12 | Carl Edwards Jr.# | 8.22 | 2015 | |
| 13 | Dillon Peters# | 8.19 | 2025 | |
| 14 | Jacob Nix# | 8.18 | 2023 | |
| 15 | Joan Adon# | 8.17 | 2026 | |
| 16 | Noah Davis# | 8.15 | 2026 | |
| 17 | Eric Hacker | 8.10 | 2016 | |
| 18 | Roniel Raudes# | 8.09 | 2025 | |
| 19 | Steven Wright | 8.01 | 2015 | |
| 20 | Zach Thornton# | 7.96 | 2026 | |
| 21 | Ariel Pena | 7.95 | 2015 | |
| 21 | Mark Appel | 7.95 | 2015 | |
| 23 | Kyle Lobstein | 7.92 | 2013 | |
| 24 | Luis Madero# | 7.82 | 2022 | |
| 25 | Mark Appel | 7.76 | 2016 | |
| 26 | Jakob Junis# | 7.71 | 2017 | |
| 27 | Ryan Murphy# | 7.67 | 2025 | |
| 28 | David Festa# | 7.59 | 2024 | |
| 29 | Marcelo Martinez# | 7.52 | 2023 | |
| 30 | Rob Whalen | 7.50 | 2016 | |
| 31 | Carson Whisenhunt# | 7.47 | 2025 | |
| 32 | Eric Hacker | 7.44 | 2018 | |
| 33 | Casey Kelly# | 7.42 | 2022 | |
| 34 | Odrisamer Despaigne# | 7.38 | 2022 | |
| 35 | Nick Travieso | 7.36 | 2015 | |
| 35 | William Cuevas# | 7.36 | 2024 | |
| 35 | Brett Kerry# | 7.36 | 2022 | |
| 38 | Zachary Nuding | 7.35 | 2013 | |
| 39 | Orangel Arenas | 7.30 | 2015 | |
| 40 | Dylan Axelrod | 7.26 | 2014 | |
| 41 | Casey Kelly# | 7.25 | 2023 | |
| 42 | Ryan Dennick | 7.23 | 2015 | |
| 43 | David Buchanan# | 7.22 | 2022 | |
| 44 | Brad Bergesen | 7.12 | 2015 | |
| 45 | William Cuevas# | 7.04 | 2023 | |
| 45 | Cody Martin | 7.04 | 2013 | |
| 47 | Logan Darnell | 6.98 | 2015 | |
| 47 | Brad Bergesen | 6.98 | 2014 | |
| 49 | Trenton Wallace# | 6.96 | 2025 | |
| 50 | Adalberto Mejia | 6.90 | 2017 | |
| 51 | Sam Gaviglio | 6.87 | 2017 | |
| 52 | Jordan Lyles# | 6.80 | 2025 | |
| 52 | Tejay Antone# | 6.80 | 2024 | |
| 54 | Justin Dunn# | 6.78 | 2024 | |
| 55 | Mikey O'Brien | 6.76 | 2015 | |
| 55 | Robbie Erlin | 6.76 | 2017 | |
| 57 | Jacob Miller# | 6.69 | 2026 | |
| 58 | Marcelo Martinez# | 6.63 | 2026 | |
| 58 | Miguel Celestino | 6.63 | 2015 | |
| 60 | Ryan Carpenter# | 6.62 | 2022 | |
| 60 | Casey Kelly# | 6.62 | 2024 | |
| 62 | Tim Melville | 6.61 | 2015 | |
| 63 | Luis Madero# | 6.59 | 2023 | |
| 64 | Zech Lemond | 6.55 | 2017 | |
| 65 | James McArthur# | 6.54 | 2023 | |
| 66 | Justin Nicolino | 6.50 | 2015 | |
| 67 | Joander Suarez# | 6.48 | 2025 | |
| 67 | Tim Melville | 6.48 | 2014 | |
| 69 | Mario Hollands | 6.38 | 2016 | |
| 70 | Drew Rucinski# | 6.34 | 2024 | |
| 71 | Aaron Thompson | 6.28 | 2013 | |
| 72 | Charlie Barnes# | 6.25 | 2022 | |
| 72 | Odrisamer Despaigne# | 6.25 | 2023 | |
| 74 | Seth Shuman# | 6.15 | 2025 | |
| 74 | Julian Aguiar# | 6.15 | 2025 | |
| 76 | Mason Adams# | 5.91 | 2025 | |
| 76 | Jack Patterson | 5.91 | 2021 | |
| 78 | David Buchanan# | 5.90 | 2023 | |
| 79 | Mitch Myers# | 5.87 | 2025 | |
| 80 | Ryan Carpenter# | 5.83 | 2023 | |
| 81 | Ryan Carpenter# | 5.80 | 2021 | |
| 82 | Nick Bush# | 5.60 | 2025 | |
| 83 | Eric Hacker | 5.57 | 2020 | |
| 84 | Brett Kerry# | 5.55 | 2024 | |
| 85 | Drew Rucinski# | 5.54 | 2021 | |
| 85 | Colin Rea# | 5.54 | 2021 | |
| 87 | Williams Perez | 5.08 | 2021 | |
| 88 | Ryan Rolison# | 4.66 | 2024 | |
| 89 | Pierson Ohl# | 4.53 | 2025 |
