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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Hidemichi Kikuchi | 1.24 | 2017-2022 | |
| 2 | Máximo Cucalón | 1.29 | 2016-2025 | |
| 3 | David Bryan | 1.31 | 2012-2025 | |
| 4 | Gregg Emerson# | 1.32 | 2024-2031 | |
| 5 | Sancho Ortega | 1.38 | 2021-2028 | |
| 5 | Júlio Herrera# | 1.38 | 2021-2032 | |
| 7 | Kaong Foong# | 1.40 | 2026-2032 | |
| 8 | Si-dao Chen# | 1.42 | 2024-2031 | |
| 8 | Dick Wassenaer | 1.42 | 2020-2028 | |
| 8 | Iván Rea | 1.42 | 2021-2028 | |
| 11 | Andrew St. John | 1.47 | 2015-2019 | |
| 12 | Kang-il Hyong# | 1.50 | 2028-2032 | |
| 13 | Daisuke Nakanishi | 1.52 | 2017-2026 | |
| 14 | Román Cruz | 1.57 | 2018-2025 | |
| 15 | Noritoshi Hayashi# | 1.58 | 2024-2031 | |
| 16 | Sergio Ortíz | 1.59 | 2014-2020 | |
| 17 | Adam Lewis# | 1.60 | 2025-2032 | |
| 17 | Lourenço Russa# | 1.60 | 2027-2032 | |
| 19 | Bob Hill | 1.62 | 2020-2028 | |
| 20 | Mario Robles# | 1.90 | 2025-2032 |
