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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Stanley Williams# | 1.26 | 2017-2020 | |
| 2 | Mike Foltynewicz# | 1.32 | 2026-2028 | |
| 3 | Pat Hunt# | 1.35 | 2017-2025 | |
| 4 | César González# | 1.36 | 2020-2028 | |
| 5 | Phil Miller# | 1.38 | 2026-2028 | |
| 6 | Titus Parson# | 1.41 | 2023-2027 | |
| 7 | Juan Pérez | 1.43 | 2017-2023 | |
| 8 | Ben Logan# | 1.46 | 2019-2023 | |
| 8 | Kyle McPherson | 1.46 | 2018-2023 | |
| 8 | Paco Hernández# | 1.46 | 2021-2027 | |
| 8 | Lester Sullivan# | 1.46 | 2018-2020 | |
| 8 | Carlos Hernández# | 1.46 | 2021-2028 | |
| 13 | Shawn Arnold# | 1.47 | 2017-2020 | |
| 14 | Lance de Valk# | 1.49 | 2025-2028 | |
| 15 | John Hamilton# | 1.51 | 2017-2027 | |
| 16 | Jeff Cox | 1.59 | 2018-2021 | |
| 17 | Arnie Banks# | 1.61 | 2024-2028 | |
| 18 | Steve Sanders | 1.70 | 2015-2019 |
