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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Mike Foltynewicz# | 1.32 | 2026-2028 | |
| 2 | Pat Hunt | 1.35 | 2017-2029 | |
| 3 | César González | 1.39 | 2020-2029 | |
| 4 | Juan Pérez | 1.43 | 2017-2023 | |
| 5 | Ben Logan# | 1.46 | 2019-2023 | |
| 5 | Paco Hernández | 1.46 | 2021-2027 | |
| 5 | Carlos Hernández | 1.46 | 2021-2028 | |
| 8 | Lance de Valk# | 1.48 | 2025-2030 | |
| 9 | Arnie Banks# | 1.61 | 2024-2028 |
