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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Eric Hacker | 1.25 | 2017-2022 | |
| 2 | Logan Darnell | 1.42 | 2013-2024 | |
| 3 | Jordan Guerrero# | 1.55 | 2017-2025 | |
| 4 | Mark Leiter Jr.# | 1.61 | 2015-2021 |
