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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Tomiji Saikawa | 1.19 | 2023-2028 | |
| 2 | Carlos Díaz# | 1.23 | 2022-2028 | |
| 3 | Miguel Mora | 1.28 | 2015-2020 | |
| 3 | Zane Reed# | 1.28 | 2017-2028 | |
| 5 | Bob Payne# | 1.29 | 2025-2027 | |
| 6 | Xavier Padilla# | 1.31 | 2025-2028 | |
| 7 | Miguel González | 1.33 | 2015-2018 | |
| 8 | Javier Penela | 1.36 | 2015-2020 | |
| 8 | Fernando Reyna# | 1.36 | 2015-2027 | |
| 10 | Jorge Velázquez | 1.37 | 2017-2025 | |
| 11 | Ipe Talboom# | 1.40 | 2024-2028 | |
| 11 | Júlio Hernández | 1.40 | 2015-2019 | |
| 13 | Víctor García# | 1.43 | 2017-2021 | |
| 14 | Raúl Pérez | 1.46 | 2015-2028 | |
| 14 | Il-gyung Kim | 1.46 | 2017-2026 | |
| 16 | Gustavo Pérez# | 1.47 | 2018-2024 | |
| 16 | Romano Martínez# | 1.47 | 2024-2029 | |
| 18 | Plinio Pedrulho# | 1.50 | 2020-2029 | |
| 19 | Horace McKenzie# | 1.51 | 2016-2021 | |
| 20 | John Tanner | 1.56 | 2015-2019 | |
| 21 | Elroy Gardner | 1.62 | 2015-2019 | |
| 22 | Ernest Gunter | 1.64 | 2015-2024 | |
| 22 | Jeremy de Vos# | 1.64 | 2022-2025 | |
| 24 | Juan Núñez | 1.65 | 2015-2018 |
