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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 | Aurelio López# | 1.04 | 2022-2031 | |
| 3 | Lou Hartling | 1.07 | 2019-2030 | |
| 4 | Eddie Kop# | 1.08 | 2023-2033 | |
| 5 | Juan Guillén# | 1.09 | 2027-2033 | |
| 6 | Wes Hamm# | 1.10 | 2021-2027 | |
| 6 | Walt Coffman# | 1.10 | 2026-2033 | |
| 6 | Javier Mora# | 1.10 | 2020-2031 | |
| 6 | Gary Bailey | 1.10 | 2022-2031 | |
| 10 | Wayne Craig | 1.12 | 2015-2023 | |
| 11 | Hunter Wilson | 1.16 | 2019-2031 | |
| 11 | Allen Blair# | 1.16 | 2015-2032 | |
| 13 | Wayne Hurst | 1.18 | 2015-2028 | |
| 13 | Pedro Valdéz# | 1.18 | 2020-2033 | |
| 15 | Vincent Hall | 1.19 | 2021-2031 | |
| 15 | Bobby Swain | 1.19 | 2020-2031 | |
| 17 | Bartolomeu Lio# | 1.20 | 2019-2033 | |
| 17 | Rafael Rodríguez# | 1.20 | 2026-2031 | |
| 17 | Adrián Fierro# | 1.20 | 2017-2032 | |
| 20 | Nathaniel Riley | 1.21 | 2016-2030 | |
| 20 | Manny Caraballo# | 1.21 | 2022-2028 | |
| 22 | Stanley Yelnats# | 1.23 | 2030-2033 | |
| 22 | Nicholas Wells# | 1.23 | 2019-2032 | |
| 22 | Rafael Cardona# | 1.23 | 2022-2033 | |
| 22 | John Braun | 1.23 | 2014-2022 | |
| 22 | George Frazier# | 1.23 | 2017-2033 | |
| 27 | Kyle Boddy# | 1.24 | 2026-2033 | |
| 28 | Benny York | 1.25 | 2016-2027 | |
| 28 | Jeff Hale | 1.25 | 2014-2027 | |
| 28 | Rich Hunter | 1.25 | 2014-2021 | |
| 28 | Roderick Rhodes | 1.25 | 2017-2028 | |
| 32 | Héctor Alarcon# | 1.26 | 2015-2027 | |
| 32 | Francis McBride# | 1.26 | 2023-2027 | |
| 34 | John Holley | 1.27 | 2014-2022 | |
| 34 | Paul Díaz | 1.27 | 2019-2030 | |
| 36 | Cory Sanders# | 1.31 | 2021-2033 | |
| 36 | Félix Jiménez | 1.31 | 2018-2028 | |
| 36 | Henry Hall | 1.31 | 2015-2026 | |
| 36 | Jon Dunn# | 1.31 | 2024-2033 | |
| 40 | Arnie Pittman# | 1.32 | 2022-2030 | |
| 40 | Pedro Castro | 1.32 | 2018-2032 | |
| 40 | Juan Torres# | 1.32 | 2021-2032 | |
| 43 | Domingo Ramírez# | 1.33 | 2022-2033 | |
| 43 | Chip Bishop | 1.33 | 2018-2028 | |
| 43 | Andy Coker | 1.33 | 2016-2026 | |
| 46 | Juan Díaz# | 1.35 | 2025-2030 | |
| 46 | Luis Torres# | 1.35 | 2024-2031 | |
| 48 | Rafael Rivera# | 1.36 | 2027-2033 | |
| 48 | John Woods# | 1.36 | 2024-2033 | |
| 48 | Truman Valentine# | 1.36 | 2022-2031 | |
| 48 | Tyler MacHugh# | 1.36 | 2023-2033 | |
| 52 | Roger Garrett | 1.37 | 2014-2024 | |
| 52 | Pat Horton | 1.37 | 2014-2019 | |
| 54 | Leslie Brooks | 1.38 | 2019-2030 | |
| 55 | Gustavo Pérez# | 1.42 | 2027-2033 | |
| 56 | Robbie Baxter# | 1.44 | 2022-2033 | |
| 57 | António Marés# | 1.45 | 2024-2031 | |
| 58 | Allen Yohemas# | 1.48 | 2022-2031 | |
| 59 | Aaron Wise | 1.50 | 2019-2029 | |
| 60 | Harris Howard | 1.51 | 2014-2017 |
