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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ralph McKinney | 0.97 | 2019-2034 | |
| 2 | Sozen Raikatuji | 1.00 | 2016-2023 | |
| 3 | Eric Matson# | 1.03 | 2028-2036 | |
| 4 | Guillermo García | 1.04 | 2013-2021 | |
| 4 | Jorge Aguirre | 1.04 | 2015-2032 | |
| 6 | Pedro Alejándrez | 1.05 | 2021-2034 | |
| 6 | Devin Hinton | 1.05 | 2013-2023 | |
| 8 | Ryan Ray | 1.07 | 2013-2021 | |
| 9 | John Wilkins* | 1.09 | 2013-2028 | |
| 9 | Edwin Ellis | 1.09 | 2013-2019 | |
| 11 | Ryan Davis* | 1.10 | 2015-2026 | |
| 11 | Todd Hines | 1.10 | 2018-2032 | |
| 11 | Yoriyoshi Yamamoto | 1.10 | 2016-2026 | |
| 11 | Bruce Wright | 1.10 | 2020-2030 | |
| 15 | Jesús Caldero | 1.11 | 2018-2027 | |
| 15 | Jesús Franco# | 1.11 | 2026-2033 | |
| 15 | Jim Eliott* | 1.11 | 2014-2025 | |
| 15 | Jesús Gonzáles | 1.11 | 2019-2030 | |
| 19 | José Hernández | 1.12 | 2013-2023 | |
| 19 | Yuri Volkers | 1.12 | 2013-2021 | |
| 19 | Ramón Ortega* | 1.12 | 2013-2028 | |
| 22 | Alec Pittman | 1.13 | 2016-2030 | |
| 22 | Lúcio Sánchez | 1.13 | 2017-2031 | |
| 22 | Tom Reynolds* | 1.13 | 2015-2028 | |
| 22 | Cordell Wilson | 1.13 | 2019-2030 | |
| 26 | Iván García | 1.14 | 2021-2035 | |
| 26 | Keisuke Nishida# | 1.14 | 2029-2036 | |
| 28 | Miguel Rubia# | 1.16 | 2029-2035 | |
| 28 | Raúl Areola | 1.16 | 2020-2033 | |
| 28 | John Kaufman | 1.16 | 2017-2032 | |
| 28 | Raúl Gómez | 1.16 | 2027-2033 | |
| 32 | Jorge Otero# | 1.17 | 2031-2036 | |
| 32 | Alejandro Guerra# | 1.17 | 2027-2034 | |
| 32 | John Dempsey# | 1.17 | 2022-2036 | |
| 35 | Aurelio López# | 1.18 | 2022-2036 | |
| 35 | Vincent Hall | 1.18 | 2020-2032 | |
| 35 | Wes Hamm# | 1.18 | 2021-2035 | |
| 38 | Curtis Fields | 1.19 | 2016-2024 | |
| 38 | Burt Booth | 1.19 | 2013-2026 | |
| 38 | Cris Mendoza | 1.19 | 2013-2029 | |
| 38 | Gerardo Pagán# | 1.19 | 2027-2036 | |
| 38 | Chester Henry | 1.19 | 2016-2023 | |
| 43 | Edgardo Marín | 1.20 | 2013-2032 | |
| 43 | Mimosa Joseph | 1.20 | 2023-2035 | |
| 45 | Luis Flores# | 1.21 | 2024-2033 | |
| 45 | Eddie Kop# | 1.21 | 2025-2036 | |
| 45 | Juan Júlio | 1.21 | 2013-2026 | |
| 48 | Wayne Craig | 1.22 | 2018-2030 | |
| 48 | Fraser Cuevas | 1.22 | 2020-2032 | |
| 48 | José García | 1.22 | 2022-2035 | |
| 51 | Yoo-chul Mun# | 1.23 | 2031-2036 | |
| 51 | Manuel Rojas | 1.23 | 2018-2028 | |
| 51 | Germán Rodríguez# | 1.23 | 2024-2036 | |
| 51 | Ramón Molina | 1.23 | 2026-2034 | |
| 51 | Wayne Hurst | 1.23 | 2015-2024 | |
| 56 | Pablo De La Torre# | 1.24 | 2021-2034 | |
| 56 | Pat Farrell | 1.24 | 2013-2022 | |
| 58 | Kirby Brown | 1.25 | 2017-2029 | |
| 58 | George Frazier# | 1.25 | 2019-2036 | |
| 60 | Bill Fletcher | 1.26 | 2018-2025 | |
| 61 | Bill Oulton | 1.27 | 2021-2034 | |
| 61 | Billy Crawford | 1.27 | 2014-2025 | |
| 61 | Giovanni Mireles# | 1.27 | 2029-2036 | |
| 64 | Enrique Cortéz | 1.28 | 2022-2032 | |
| 64 | Miguel Castillo | 1.28 | 2013-2020 | |
| 64 | Enrique Magana | 1.28 | 2013-2019 | |
| 67 | Juan Torres | 1.29 | 2023-2029 | |
| 68 | Addie Samson# | 1.30 | 2021-2035 | |
| 69 | Tobías Pérez# | 1.31 | 2024-2036 | |
| 69 | Calvin Beck# | 1.31 | 2026-2033 | |
| 69 | Luis Peńa# | 1.31 | 2025-2036 | |
| 72 | Gerald Keller# | 1.33 | 2030-2036 | |
| 73 | Josef van der Poel# | 1.34 | 2019-2035 | |
| 74 | José Flores | 1.35 | 2019-2029 | |
| 75 | Natalino Golaio# | 1.36 | 2023-2036 | |
| 76 | Ilie Paunescu | 1.37 | 2016-2035 | |
| 77 | Yin-fat Foong | 1.38 | 2017-2029 | |
| 78 | Vern Camp | 1.40 | 2013-2022 | |
| 79 | Sy-ing Tah# | 1.42 | 2030-2036 | |
| 80 | Cole Hall | 1.43 | 2013-2027 | |
| 80 | Pedro Ramírez | 1.43 | 2023-2032 | |
| 82 | Mario Peńa | 1.45 | 2013-2023 | |
| 83 | Edgar Martínez | 1.47 | 2013-2021 |
