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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jose Urena | 1.20 | 2015-2026 | |
| 2 | Aaron Slegers | 1.27 | 2016-2027 | |
| 3 | Radovan Santrac | 1.32 | 2018-2024 | |
| 4 | Jed Bradley | 1.38 | 2016-2024 | |
| 5 | Raúl Carrión | 1.40 | 2025-2033 | |
| 5 | Pete Kelich | 1.40 | 2016-2024 | |
| 7 | Barret Loux | 1.41 | 2015-2021 | |
| 8 | Joe Wieland | 1.42 | 2015-2024 | |
| 9 | Cory Jones | 1.46 | 2015-2025 | |
| 9 | Ryan Warner | 1.46 | 2016-2023 | |
| 11 | Francis Martes | 1.47 | 2019-2027 | |
| 12 | Christian Friedrich | 1.51 | 2015-2020 |
