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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Howard Randolph# | 0.93 | 2048-2054 | |
| 2 | John Wilkins* | 0.96 | 2015-2026 | |
| 3 | Urs Ehles | 0.98 | 2036-2051 | |
| 4 | Van Hileman# | 1.00 | 2041-2049 | |
| 5 | Eddie Kop* | 1.05 | 2023-2042 | |
| 6 | Janghyun Han# | 1.08 | 2044-2053 | |
| 6 | Jesús Vidro | 1.08 | 2033-2045 | |
| 8 | Fernando Lujino# | 1.10 | 2042-2054 | |
| 8 | Javier Mora | 1.10 | 2020-2034 | |
| 8 | Zhao-ji Qiu | 1.10 | 2036-2044 | |
| 11 | Wes Hamm* | 1.11 | 2021-2037 | |
| 12 | Wayne Craig | 1.12 | 2015-2023 | |
| 12 | Dave Becker# | 1.12 | 2040-2053 | |
| 14 | Juan Guillén* | 1.13 | 2027-2039 | |
| 15 | Heath Brown# | 1.14 | 2043-2053 | |
| 15 | Anatoly Ivanovich | 1.14 | 2030-2039 | |
| 17 | Manuel Martínez# | 1.15 | 2048-2054 | |
| 18 | Paul Haines | 1.16 | 2038-2052 | |
| 18 | Walt Coffman* | 1.16 | 2026-2038 | |
| 18 | Allen Blair | 1.16 | 2015-2032 | |
| 21 | Ratko Davidovic | 1.17 | 2035-2043 | |
| 22 | Wayne Hurst | 1.18 | 2015-2028 | |
| 22 | Gregory Collins# | 1.18 | 2045-2052 | |
| 22 | Jay Newton# | 1.18 | 2042-2052 | |
| 25 | Vincent Hall | 1.19 | 2021-2031 | |
| 25 | Bobby Swain | 1.19 | 2020-2031 | |
| 27 | Pedro Valdéz | 1.20 | 2020-2040 | |
| 27 | Travis Morgan | 1.20 | 2039-2049 | |
| 27 | Mario Gonzáles# | 1.20 | 2045-2052 | |
| 27 | Chase Davis# | 1.20 | 2049-2053 | |
| 31 | Nathaniel Riley | 1.21 | 2016-2030 | |
| 31 | Bartolomeu Lio | 1.21 | 2019-2034 | |
| 31 | Manny Caraballo | 1.21 | 2022-2028 | |
| 34 | Virgil Dickerson# | 1.22 | 2043-2053 | |
| 34 | Stanley Yelnats | 1.22 | 2030-2038 | |
| 34 | Stanford McCain | 1.22 | 2031-2041 | |
| 37 | Nicholas Wells | 1.23 | 2019-2032 | |
| 37 | David Moore | 1.23 | 2034-2046 | |
| 37 | John Braun | 1.23 | 2014-2022 | |
| 37 | George Frazier | 1.23 | 2017-2036 | |
| 37 | Faisal bin Nabeel | 1.23 | 2034-2041 | |
| 42 | Jeff Hale | 1.25 | 2014-2027 | |
| 42 | César Sandoval | 1.25 | 2038-2048 | |
| 42 | Bailey Borrett | 1.25 | 2043-2052 | |
| 42 | Chase Sims | 1.25 | 2039-2049 | |
| 42 | Roderick Rhodes | 1.25 | 2017-2028 | |
| 47 | Héctor Alarcon | 1.26 | 2015-2027 | |
| 47 | Rafael Cardona | 1.26 | 2022-2035 | |
| 47 | Gustavo Tobías | 1.26 | 2032-2044 | |
| 50 | John Holley | 1.27 | 2014-2022 | |
| 50 | Matthew Fallows | 1.27 | 2034-2048 | |
| 50 | Paul Díaz | 1.27 | 2019-2030 | |
| 53 | Joe Pruitt | 1.28 | 2031-2039 | |
| 54 | Francisco Díaz | 1.29 | 2036-2050 | |
| 54 | Lorenzo Fabián | 1.29 | 2029-2041 | |
| 56 | Yin-zhen Wu | 1.30 | 2043-2050 | |
| 56 | Cory Sanders | 1.30 | 2021-2036 | |
| 58 | Félix Jiménez | 1.31 | 2018-2028 | |
| 58 | Henry Hall | 1.31 | 2015-2026 | |
| 60 | Arnie Pittman | 1.32 | 2022-2030 | |
| 60 | Pedro Castro | 1.32 | 2018-2032 | |
| 60 | Anastasio Cabanillas Jr. | 1.32 | 2037-2046 | |
| 60 | Juan Torres | 1.32 | 2021-2032 | |
| 60 | Juan Díaz | 1.32 | 2025-2036 | |
| 65 | Chip Bishop | 1.33 | 2018-2028 | |
| 65 | Currito Fonseca | 1.33 | 2038-2050 | |
| 65 | Andy Coker | 1.33 | 2016-2026 | |
| 68 | Juan Moreno | 1.34 | 2037-2045 | |
| 69 | Luis Torres | 1.35 | 2024-2035 | |
| 70 | Tyler MacHugh | 1.36 | 2023-2033 | |
| 71 | Ton Jobse | 1.37 | 2031-2045 | |
| 71 | Pat Horton | 1.37 | 2014-2019 | |
| 71 | Domingo Ramírez | 1.37 | 2022-2039 | |
| 71 | Craig Fitzgerald | 1.37 | 2036-2050 | |
| 75 | Robbie Baxter | 1.44 | 2022-2037 | |
| 76 | António Marés | 1.45 | 2024-2031 | |
| 77 | Allen Yohemas | 1.48 | 2022-2031 | |
| 78 | Roger Rodenburg | 1.49 | 2036-2044 | |
| 79 | John Rigsby | 1.51 | 2034-2047 |
