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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Dakota Hudson# | 0.50 | 2021 | |
| 2 | Garrett Hill# | 0.87 | 2025 | |
| 3 | Dario Agrazal# | 0.96 | 2021 | |
| 4 | Sammy Solis | 1.05 | 2015 | |
| 5 | Carl Edwards Jr.# | 1.09 | 2015 | |
| 6 | Kyle McPherson | 1.14 | 2016 | |
| 7 | Drew Rucinski# | 1.19 | 2024 | |
| 8 | Dan Straily | 1.22 | 2021 | |
| 8 | Blade Tidwell# | 1.22 | 2024 | |
| 10 | Ryan Yarbrough# | 1.23 | 2017 | |
| 11 | Robert Stephenson# | 1.25 | 2014 | |
| 11 | Marcus Stroman# | 1.25 | 2014 | |
| 13 | Ryan Carpenter# | 1.30 | 2021 | |
| 14 | Clayton Blackburn | 1.33 | 2015 | |
| 15 | Sam Bachman# | 1.35 | 2024 | |
| 16 | Tyler Thornburg | 1.36 | 2013 | |
| 17 | Michael Kopech# | 1.38 | 2018 | |
| 18 | Zachary Nuding | 1.39 | 2013 | |
| 19 | Matt Grimes | 1.44 | 2018 | |
| 20 | Tejay Antone# | 1.53 | 2019 | |
| 21 | Pierce Johnson# | 1.58 | 2015 | |
| 22 | Henry Owens | 1.63 | 2014 | |
| 23 | Logan Darnell | 1.82 | 2014 | |
| 23 | Scott Snodgress | 1.82 | 2013 | |
| 25 | Tanner Gordon# | 2.00 | 2023 |
