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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 | 2019-2030 | |
| 2 | Pedro Alejándrez# | 1.00 | 2021-2030 | |
| 2 | Sozen Raikatuji | 1.00 | 2016-2023 | |
| 4 | Jorge Aguirre# | 1.04 | 2015-2030 | |
| 4 | Guillermo García | 1.04 | 2013-2021 | |
| 6 | Devin Hinton | 1.05 | 2013-2023 | |
| 6 | Todd Hines# | 1.05 | 2018-2030 | |
| 8 | Ryan Ray | 1.07 | 2013-2021 | |
| 9 | Jesús Franco# | 1.08 | 2026-2030 | |
| 10 | John Wilkins | 1.09 | 2013-2028 | |
| 10 | Edwin Ellis | 1.09 | 2013-2019 | |
| 12 | Ryan Davis | 1.10 | 2015-2026 | |
| 12 | Yoriyoshi Yamamoto | 1.10 | 2016-2026 | |
| 12 | Bruce Wright# | 1.10 | 2020-2030 | |
| 15 | Jesús Caldero | 1.11 | 2018-2027 | |
| 15 | Jim Eliott | 1.11 | 2014-2025 | |
| 15 | Lúcio Sánchez# | 1.11 | 2017-2030 | |
| 15 | Jesús Gonzáles# | 1.11 | 2019-2030 | |
| 15 | John Dempsey# | 1.11 | 2022-2030 | |
| 20 | José Hernández | 1.12 | 2013-2023 | |
| 20 | Aurelio López# | 1.12 | 2022-2030 | |
| 20 | Yuri Volkers | 1.12 | 2013-2021 | |
| 20 | Ramón Ortega | 1.12 | 2013-2028 | |
| 24 | Alec Pittman | 1.13 | 2016-2030 | |
| 24 | Tom Reynolds | 1.13 | 2015-2028 | |
| 24 | Cordell Wilson# | 1.13 | 2019-2030 | |
| 24 | Iván García# | 1.13 | 2021-2030 | |
| 28 | John Kaufman# | 1.15 | 2017-2030 | |
| 28 | Vincent Hall# | 1.15 | 2020-2027 | |
| 28 | Raúl Areola# | 1.15 | 2020-2030 | |
| 31 | Ole Kos | 1.16 | 2018-2027 | |
| 31 | Wes Hamm# | 1.16 | 2021-2030 | |
| 33 | Javier Ramírez | 1.18 | 2018-2027 | |
| 33 | José García# | 1.18 | 2022-2030 | |
| 35 | Adrián Fierro# | 1.19 | 2018-2030 | |
| 35 | Mimosa Joseph# | 1.19 | 2023-2030 | |
| 35 | John Coleman | 1.19 | 2013-2025 | |
| 35 | Curtis Fields | 1.19 | 2016-2024 | |
| 35 | Burt Booth | 1.19 | 2013-2026 | |
| 35 | Fraser Cuevas# | 1.19 | 2020-2030 | |
| 35 | Cris Mendoza | 1.19 | 2013-2029 | |
| 35 | Chester Henry | 1.19 | 2016-2023 | |
| 35 | Kyle Lewis | 1.19 | 2016-2026 | |
| 44 | Edgardo Marín# | 1.20 | 2013-2030 | |
| 45 | Juan Júlio | 1.21 | 2013-2026 | |
| 46 | Luis Flores# | 1.22 | 2024-2030 | |
| 46 | Wayne Craig# | 1.22 | 2018-2030 | |
| 46 | Enrique Cortéz# | 1.22 | 2022-2029 | |
| 46 | Bartolomeu Lio# | 1.22 | 2018-2029 | |
| 46 | Bill Oulton# | 1.22 | 2021-2030 | |
| 51 | Manuel Rojas | 1.23 | 2018-2028 | |
| 51 | Makoto Kato | 1.23 | 2019-2024 | |
| 51 | Wayne Hurst | 1.23 | 2015-2024 | |
| 54 | Juan Gusmán# | 1.24 | 2024-2030 | |
| 54 | Bill Grange | 1.24 | 2013-2017 | |
| 54 | Earnest Casey | 1.24 | 2018-2025 | |
| 54 | Pat Farrell | 1.24 | 2013-2022 | |
| 58 | George Frazier# | 1.25 | 2019-2029 | |
| 58 | Pablo De La Torre# | 1.25 | 2021-2030 | |
| 58 | Kirby Brown | 1.25 | 2017-2029 | |
| 61 | Tobías Pérez# | 1.26 | 2024-2030 | |
| 61 | Bill Fletcher | 1.26 | 2018-2025 | |
| 63 | Billy Crawford | 1.27 | 2014-2025 | |
| 64 | Miguel Castillo | 1.28 | 2013-2020 | |
| 64 | Enrique Magana | 1.28 | 2013-2019 | |
| 66 | Juan Valéncia# | 1.29 | 2023-2030 | |
| 66 | Juan Torres# | 1.29 | 2023-2029 | |
| 66 | Calvin Beck# | 1.29 | 2026-2030 | |
| 69 | Allen Blair# | 1.30 | 2021-2030 | |
| 69 | Juan Pérez# | 1.30 | 2020-2030 | |
| 71 | Peter Rivers | 1.31 | 2013-2020 | |
| 72 | Reid Garner | 1.32 | 2015-2022 | |
| 73 | Clancy McKinney# | 1.33 | 2023-2030 | |
| 74 | Josef van der Poel# | 1.34 | 2019-2030 | |
| 75 | José Flores# | 1.35 | 2019-2029 | |
| 76 | Pedro Martínez | 1.36 | 2013-2017 | |
| 77 | Yin-fat Foong | 1.38 | 2017-2029 | |
| 78 | Vern Camp | 1.40 | 2013-2022 | |
| 79 | Pedro Ramírez# | 1.42 | 2023-2029 | |
| 79 | Ilie Paunescu# | 1.42 | 2016-2030 | |
| 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 | |
| 84 | Christian Pitts | 1.45 | 2015-2025 | |
| 84 | Ramón Torres# | 1.45 | 2022-2030 | |
| 87 | Edgar Martínez | 1.47 | 2013-2021 | |
| 88 | Kaluka Wene# | 1.53 | 2016-2029 | |
| 89 | Armando Hernández | 1.70 | 2013-2018 |
