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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Bryan Houston | 1.20 | 2019-2026 | |
| 2 | Tomiji Saikawa | 1.22 | 2021-2024 | |
| 3 | Juan Cruz# | 1.28 | 2021-2029 | |
| 4 | James Scott# | 1.35 | 2022-2029 | |
| 5 | Fernando González | 1.37 | 2017-2024 | |
| 5 | Jason McKinney | 1.37 | 2015-2024 | |
| 7 | Edward Whipp# | 1.39 | 2023-2029 | |
| 8 | Nate Rogers | 1.43 | 2017-2025 | |
| 8 | Rodger de Meza# | 1.43 | 2022-2026 | |
| 10 | Ron Barry | 1.44 | 2015-2019 | |
| 10 | Grant White | 1.44 | 2022-2028 | |
| 12 | Marv Bradford# | 1.46 | 2027-2029 | |
| 13 | Huai-yu Kan | 1.48 | 2015-2022 | |
| 13 | Raúl Pérez | 1.48 | 2015-2025 | |
| 15 | Cole Johnson | 1.50 | 2016-2020 | |
| 16 | Júlio Hernández | 1.51 | 2016-2025 | |
| 16 | Artie Chávez# | 1.51 | 2022-2027 | |
| 18 | Alfredo Ríos# | 1.53 | 2022-2027 | |
| 18 | Dave Ponsonby | 1.53 | 2015-2024 | |
| 18 | Bryan Palmer# | 1.53 | 2027-2029 | |
| 18 | Aaron Wise# | 1.53 | 2017-2023 | |
| 22 | Juan Reyes# | 1.55 | 2024-2028 | |
| 23 | Joe Holmes | 1.61 | 2016-2020 | |
| 24 | Eric Newell# | 1.64 | 2020-2024 | |
| 25 | Robert Neal# | 1.65 | 2021-2027 | |
| 26 | Manny Pérez# | 1.70 | 2024-2029 | |
| 27 | Juan Lara# | 1.71 | 2025-2029 | |
| 28 | Santiago Mesa# | 1.77 | 2024-2029 | |
| 29 | Manuel Delgado | 1.78 | 2016-2026 | |
| 29 | Gordon Wiggins# | 1.78 | 2015-2025 | |
| 31 | Jeff Krause | 2.04 | 2016-2025 |
