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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Malulani Anakone# | 1.07 | 2025-2028 | |
| 2 | José Pueblo# | 1.10 | 2026-2028 | |
| 3 | Manuel Sánchez# | 1.11 | 2026-2028 | |
| 3 | Masahiro Sakei# | 1.11 | 2028-2029 | |
| 5 | Felipe Becerra | 1.12 | 2021-2025 | |
| 5 | William Fothergill# | 1.12 | 2028-2029 | |
| 7 | Kas Groen# | 1.14 | 2023-2026 | |
| 8 | Luis Arreola# | 1.15 | 2024-2027 | |
| 8 | Carlos Ortega | 1.15 | 2022-2026 | |
| 10 | Vitorio Méndez | 1.18 | 2020-2025 | |
| 11 | Alberto Reyes# | 1.19 | 2020-2024 | |
| 11 | Xavier Padilla# | 1.19 | 2021-2024 | |
| 11 | Leoncio Ulibarri# | 1.19 | 2023-2028 | |
| 14 | Fernando Elías# | 1.20 | 2024-2028 | |
| 15 | Ash Ibarra# | 1.22 | 2022-2024 | |
| 15 | Rob Ford# | 1.22 | 2026-2030 | |
| 17 | Sacco Brouwers# | 1.23 | 2022-2024 | |
| 17 | Rich Choquette# | 1.23 | 2028-2030 | |
| 19 | Jeff Greer# | 1.25 | 2026-2029 | |
| 19 | Gob Bluth# | 1.25 | 2024-2028 | |
| 21 | Reid Garrett# | 1.27 | 2023-2026 | |
| 22 | Horacio Pérez | 1.32 | 2020-2023 | |
| 23 | John Orton# | 1.33 | 2022-2025 | |
| 23 | Tomás Vargas# | 1.33 | 2023-2025 | |
| 25 | Steve Costlow# | 1.36 | 2028-2029 | |
| 26 | Ricardo Ramírez# | 1.39 | 2021-2025 | |
| 27 | Baker Mayfield# | 1.42 | 2025-2026 | |
| 28 | Bill Beauregard | 1.48 | 2020-2023 | |
| 29 | Dave Seals# | 1.49 | 2023-2024 | |
| 30 | Mario Gonzáles# | 1.52 | 2022-2024 | |
| 30 | Cheh Hao | 1.52 | 2024-2025 | |
| 32 | Alfredo Sánchez | 1.77 | 2020-2022 |
