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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 | Guillermo García | 1.04 | 2013-2021 | |
| 3 | Jorge Aguirre | 1.04 | 2015-2032 | |
| 5 | Pedro Alejándrez# | 1.05 | 2021-2034 | |
| 5 | Devin Hinton | 1.05 | 2013-2023 | |
| 7 | Ryan Ray | 1.07 | 2013-2021 | |
| 8 | John Wilkins* | 1.09 | 2013-2028 | |
| 8 | Edwin Ellis | 1.09 | 2013-2019 | |
| 10 | Ryan Davis* | 1.10 | 2015-2026 | |
| 10 | Todd Hines | 1.10 | 2018-2032 | |
| 10 | Yoriyoshi Yamamoto | 1.10 | 2016-2026 | |
| 10 | Bruce Wright | 1.10 | 2020-2030 | |
| 14 | Jesús Caldero | 1.11 | 2018-2027 | |
| 14 | Jesús Franco# | 1.11 | 2026-2033 | |
| 14 | Keisuke Nishida# | 1.11 | 2029-2034 | |
| 14 | Jim Eliott | 1.11 | 2014-2025 | |
| 14 | 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 | Iván García# | 1.13 | 2021-2034 | |
| 22 | Tom Reynolds | 1.13 | 2015-2028 | |
| 22 | Cordell Wilson | 1.13 | 2019-2030 | |
| 27 | Raúl Areola | 1.16 | 2020-2033 | |
| 27 | John Kaufman | 1.16 | 2017-2032 | |
| 27 | Raúl Gómez# | 1.16 | 2027-2033 | |
| 30 | Alejandro Guerra# | 1.17 | 2027-2034 | |
| 30 | Aurelio López# | 1.17 | 2022-2034 | |
| 30 | John Dempsey# | 1.17 | 2022-2034 | |
| 30 | Eddie Kop# | 1.17 | 2025-2034 | |
| 34 | Vincent Hall | 1.18 | 2020-2032 | |
| 34 | Javier Ramírez | 1.18 | 2018-2027 | |
| 34 | Jaime van de Weideven# | 1.18 | 2022-2034 | |
| 34 | Wes Hamm# | 1.18 | 2021-2034 | |
| 38 | Adrián Fierro | 1.19 | 2018-2033 | |
| 38 | John Coleman | 1.19 | 2013-2025 | |
| 38 | Curtis Fields | 1.19 | 2016-2024 | |
| 38 | Burt Booth | 1.19 | 2013-2026 | |
| 38 | Cris Mendoza | 1.19 | 2013-2029 | |
| 38 | Chester Henry | 1.19 | 2016-2023 | |
| 38 | Kyle Lewis | 1.19 | 2016-2026 | |
| 45 | Edgardo Marín | 1.20 | 2013-2032 | |
| 45 | Mimosa Joseph# | 1.20 | 2023-2034 | |
| 47 | Luis Flores# | 1.21 | 2024-2033 | |
| 47 | Juan Júlio | 1.21 | 2013-2026 | |
| 49 | Wayne Craig | 1.22 | 2018-2030 | |
| 49 | Miguel Rubia# | 1.22 | 2029-2033 | |
| 49 | José García# | 1.22 | 2022-2034 | |
| 49 | Fraser Cuevas | 1.22 | 2020-2032 | |
| 49 | Bartolomeu Lio# | 1.22 | 2018-2034 | |
| 54 | Manuel Rojas | 1.23 | 2018-2028 | |
| 54 | Makoto Kato | 1.23 | 2019-2024 | |
| 54 | Ramón Molina# | 1.23 | 2026-2034 | |
| 54 | Wayne Hurst | 1.23 | 2015-2024 | |
| 58 | Juan Gusmán# | 1.24 | 2024-2030 | |
| 58 | Bill Grange | 1.24 | 2013-2017 | |
| 58 | Pablo De La Torre# | 1.24 | 2021-2034 | |
| 58 | Pat Farrell | 1.24 | 2013-2022 | |
| 62 | George Frazier# | 1.25 | 2019-2034 | |
| 62 | Kirby Brown | 1.25 | 2017-2029 | |
| 64 | Luis Peńa# | 1.26 | 2025-2034 | |
| 64 | Bill Fletcher | 1.26 | 2018-2025 | |
| 66 | Bill Oulton# | 1.27 | 2021-2034 | |
| 66 | Billy Crawford | 1.27 | 2014-2025 | |
| 66 | Germán Rodríguez# | 1.27 | 2024-2034 | |
| 69 | Enrique Cortéz# | 1.28 | 2022-2032 | |
| 69 | Miguel Castillo | 1.28 | 2013-2020 | |
| 69 | Enrique Magana | 1.28 | 2013-2019 | |
| 72 | Juan Torres# | 1.29 | 2023-2029 | |
| 72 | Allen Blair | 1.29 | 2021-2034 | |
| 72 | Juan Valéncia# | 1.29 | 2023-2033 | |
| 72 | Addie Samson# | 1.29 | 2021-2034 | |
| 76 | Tobías Pérez# | 1.31 | 2024-2033 | |
| 76 | Juan Pérez# | 1.31 | 2020-2032 | |
| 76 | Calvin Beck# | 1.31 | 2026-2033 | |
| 76 | Peter Rivers | 1.31 | 2013-2020 | |
| 80 | Reid Garner | 1.32 | 2015-2022 | |
| 81 | Clancy McKinney | 1.33 | 2023-2030 | |
| 82 | Josef van der Poel# | 1.34 | 2019-2034 | |
| 83 | José Flores# | 1.35 | 2019-2029 | |
| 84 | Pedro Martínez | 1.36 | 2013-2017 | |
| 84 | Natalino Golaio# | 1.36 | 2023-2034 | |
| 86 | Valentín Rivera# | 1.37 | 2026-2034 | |
| 86 | Ilie Paunescu# | 1.37 | 2016-2034 | |
| 88 | Yin-fat Foong | 1.38 | 2017-2029 | |
| 89 | Vern Camp | 1.40 | 2013-2022 | |
| 90 | Sy-ing Tah# | 1.42 | 2030-2034 | |
| 91 | Cole Hall | 1.43 | 2013-2027 | |
| 91 | Pedro Ramírez# | 1.43 | 2023-2032 | |
| 93 | Michael Battle | 1.44 | 2014-2024 | |
| 93 | Marshall Edwards | 1.44 | 2013-2022 | |
| 95 | Mario Peńa | 1.45 | 2013-2023 | |
| 96 | Edgar Martínez | 1.47 | 2013-2021 | |
| 97 | Kaluka Wene | 1.53 | 2016-2029 | |
| 98 | Armando Hernández | 1.70 | 2013-2018 |
