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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | John Wilkins* | 0.96 | 2015-2026 | |
| 2 | Eddie Kop | 1.05 | 2023-2042 | |
| 3 | Jesús Vidro# | 1.07 | 2033-2038 | |
| 4 | Javier Mora | 1.10 | 2020-2034 | |
| 5 | Wes Hamm* | 1.11 | 2021-2037 | |
| 6 | Zhao-ji Qiu# | 1.12 | 2036-2041 | |
| 6 | Wayne Craig | 1.12 | 2015-2023 | |
| 8 | Juan Guillén | 1.13 | 2027-2039 | |
| 9 | Anatoly Ivanovich | 1.14 | 2030-2039 | |
| 10 | Walt Coffman | 1.16 | 2026-2038 | |
| 10 | Allen Blair | 1.16 | 2015-2032 | |
| 12 | Wayne Hurst | 1.18 | 2015-2028 | |
| 13 | Vincent Hall | 1.19 | 2021-2031 | |
| 13 | Bobby Swain | 1.19 | 2020-2031 | |
| 15 | Pedro Valdéz | 1.20 | 2020-2040 | |
| 16 | Nathaniel Riley | 1.21 | 2016-2030 | |
| 16 | Bartolomeu Lio | 1.21 | 2019-2034 | |
| 16 | Manny Caraballo | 1.21 | 2022-2028 | |
| 19 | Stanley Yelnats | 1.22 | 2030-2038 | |
| 19 | Stanford McCain | 1.22 | 2031-2041 | |
| 21 | Nicholas Wells | 1.23 | 2019-2032 | |
| 21 | David Moore# | 1.23 | 2034-2041 | |
| 21 | John Braun | 1.23 | 2014-2022 | |
| 21 | George Frazier | 1.23 | 2017-2036 | |
| 21 | Faisal bin Nabeel# | 1.23 | 2034-2041 | |
| 26 | Jeff Hale | 1.25 | 2014-2027 | |
| 26 | Gustavo Tobías# | 1.25 | 2032-2042 | |
| 26 | Roderick Rhodes | 1.25 | 2017-2028 | |
| 29 | Héctor Alarcon | 1.26 | 2015-2027 | |
| 29 | Rafael Cardona | 1.26 | 2022-2035 | |
| 31 | John Holley | 1.27 | 2014-2022 | |
| 31 | Matthew Fallows# | 1.27 | 2034-2041 | |
| 31 | Paul Díaz | 1.27 | 2019-2030 | |
| 34 | Joe Pruitt# | 1.28 | 2031-2039 | |
| 35 | Lorenzo Fabián | 1.29 | 2029-2041 | |
| 36 | Cory Sanders | 1.30 | 2021-2036 | |
| 37 | Félix Jiménez | 1.31 | 2018-2028 | |
| 37 | Henry Hall | 1.31 | 2015-2026 | |
| 39 | Arnie Pittman | 1.32 | 2022-2030 | |
| 39 | Pedro Castro | 1.32 | 2018-2032 | |
| 39 | Juan Torres | 1.32 | 2021-2032 | |
| 39 | Juan Díaz | 1.32 | 2025-2036 | |
| 43 | Chip Bishop | 1.33 | 2018-2028 | |
| 43 | Anastasio Cabanillas Jr.# | 1.33 | 2037-2042 | |
| 43 | Andy Coker | 1.33 | 2016-2026 | |
| 46 | Luis Torres | 1.35 | 2024-2035 | |
| 47 | Tyler MacHugh | 1.36 | 2023-2033 | |
| 48 | Ton Jobse# | 1.37 | 2031-2037 | |
| 48 | Pat Horton | 1.37 | 2014-2019 | |
| 48 | Domingo Ramírez | 1.37 | 2022-2039 | |
| 51 | Roger Rodenburg# | 1.43 | 2036-2042 | |
| 52 | Robbie Baxter | 1.44 | 2022-2037 | |
| 53 | António Marés | 1.45 | 2024-2031 | |
| 54 | Allen Yohemas | 1.48 | 2022-2031 |
