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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ralph McKinney# | 0.95 | 2019-2031 | |
| 2 | Sozen Raikatuji | 1.00 | 2016-2023 | |
| 3 | Pedro Alejándrez# | 1.01 | 2021-2031 | |
| 4 | Jorge Aguirre# | 1.04 | 2015-2031 | |
| 4 | Guillermo García | 1.04 | 2013-2021 | |
| 6 | Devin Hinton | 1.05 | 2013-2023 | |
| 7 | Ryan Ray | 1.07 | 2013-2021 | |
| 7 | Todd Hines# | 1.07 | 2018-2031 | |
| 9 | John Wilkins | 1.09 | 2013-2028 | |
| 9 | Edwin Ellis | 1.09 | 2013-2019 | |
| 11 | Ryan Davis | 1.10 | 2015-2026 | |
| 11 | Yoriyoshi Yamamoto | 1.10 | 2016-2026 | |
| 11 | Bruce Wright# | 1.10 | 2020-2030 | |
| 14 | Jesús Caldero | 1.11 | 2018-2027 | |
| 14 | Jim Eliott | 1.11 | 2014-2025 | |
| 14 | Jesús Gonzáles# | 1.11 | 2019-2030 | |
| 17 | José Hernández | 1.12 | 2013-2023 | |
| 17 | Jesús Franco# | 1.12 | 2026-2031 | |
| 17 | Yuri Volkers | 1.12 | 2013-2021 | |
| 17 | Ramón Ortega | 1.12 | 2013-2028 | |
| 21 | Alec Pittman | 1.13 | 2016-2030 | |
| 21 | Lúcio Sánchez# | 1.13 | 2017-2031 | |
| 21 | Tom Reynolds | 1.13 | 2015-2028 | |
| 21 | Cordell Wilson# | 1.13 | 2019-2030 | |
| 21 | John Dempsey# | 1.13 | 2022-2031 | |
| 26 | Vincent Hall# | 1.15 | 2020-2031 | |
| 26 | Raúl Areola# | 1.15 | 2020-2031 | |
| 26 | John Kaufman# | 1.15 | 2017-2031 | |
| 26 | Alejandro Guerra# | 1.15 | 2027-2031 | |
| 26 | Iván García# | 1.15 | 2021-2031 | |
| 31 | Aurelio López# | 1.16 | 2022-2031 | |
| 32 | Wes Hamm# | 1.17 | 2021-2031 | |
| 33 | Javier Ramírez | 1.18 | 2018-2027 | |
| 34 | Adrián Fierro# | 1.19 | 2018-2030 | |
| 34 | John Coleman | 1.19 | 2013-2025 | |
| 34 | Curtis Fields | 1.19 | 2016-2024 | |
| 34 | Burt Booth | 1.19 | 2013-2026 | |
| 34 | Mimosa Joseph# | 1.19 | 2023-2031 | |
| 34 | Cris Mendoza | 1.19 | 2013-2029 | |
| 34 | Chester Henry | 1.19 | 2016-2023 | |
| 34 | Kyle Lewis | 1.19 | 2016-2026 | |
| 42 | Edgardo Marín# | 1.20 | 2013-2030 | |
| 43 | José García# | 1.21 | 2022-2031 | |
| 43 | Juan Júlio | 1.21 | 2013-2026 | |
| 45 | Wayne Craig# | 1.22 | 2018-2030 | |
| 45 | Luis Flores# | 1.22 | 2024-2031 | |
| 45 | Fraser Cuevas# | 1.22 | 2020-2031 | |
| 45 | Bartolomeu Lio# | 1.22 | 2018-2029 | |
| 49 | Manuel Rojas | 1.23 | 2018-2028 | |
| 49 | Makoto Kato | 1.23 | 2019-2024 | |
| 49 | Wayne Hurst | 1.23 | 2015-2024 | |
| 52 | Juan Gusmán# | 1.24 | 2024-2030 | |
| 52 | Bill Grange | 1.24 | 2013-2017 | |
| 52 | Pat Farrell | 1.24 | 2013-2022 | |
| 55 | George Frazier# | 1.25 | 2019-2029 | |
| 55 | Pablo De La Torre# | 1.25 | 2021-2031 | |
| 55 | Kirby Brown | 1.25 | 2017-2029 | |
| 55 | Enrique Cortéz# | 1.25 | 2022-2031 | |
| 59 | Bill Oulton# | 1.26 | 2021-2031 | |
| 59 | Bill Fletcher | 1.26 | 2018-2025 | |
| 61 | Billy Crawford | 1.27 | 2014-2025 | |
| 62 | Miguel Castillo | 1.28 | 2013-2020 | |
| 62 | Enrique Magana | 1.28 | 2013-2019 | |
| 64 | Juan Valéncia# | 1.29 | 2023-2031 | |
| 64 | Juan Torres# | 1.29 | 2023-2029 | |
| 66 | Tobías Pérez# | 1.30 | 2024-2031 | |
| 66 | Allen Blair# | 1.30 | 2021-2031 | |
| 68 | Juan Pérez# | 1.31 | 2020-2031 | |
| 68 | Calvin Beck# | 1.31 | 2026-2031 | |
| 68 | Peter Rivers | 1.31 | 2013-2020 | |
| 71 | Reid Garner | 1.32 | 2015-2022 | |
| 72 | Clancy McKinney# | 1.33 | 2023-2030 | |
| 73 | Josef van der Poel# | 1.34 | 2019-2031 | |
| 74 | José Flores# | 1.35 | 2019-2029 | |
| 75 | Pedro Martínez | 1.36 | 2013-2017 | |
| 76 | Yin-fat Foong | 1.38 | 2017-2029 | |
| 77 | Natalino Golaio# | 1.39 | 2023-2031 | |
| 78 | Ilie Paunescu# | 1.40 | 2016-2031 | |
| 78 | Vern Camp | 1.40 | 2013-2022 | |
| 80 | Pedro Ramírez# | 1.41 | 2023-2031 | |
| 81 | Cole Hall | 1.43 | 2013-2027 | |
| 82 | Michael Battle | 1.44 | 2014-2024 | |
| 82 | Marshall Edwards | 1.44 | 2013-2022 | |
| 84 | Mario Peńa | 1.45 | 2013-2023 | |
| 85 | Edgar Martínez | 1.47 | 2013-2021 | |
| 86 | Kaluka Wene# | 1.53 | 2016-2029 | |
| 87 | Armando Hernández | 1.70 | 2013-2018 |
