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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Raúl Romero# | 0.95 | 2035-2042 | |
| 2 | Ralph McKinney* | 0.97 | 2019-2034 | |
| 3 | Sozen Raikatuji* | 1.00 | 2016-2023 | |
| 4 | Guillermo García | 1.04 | 2013-2021 | |
| 4 | Eric Matson | 1.04 | 2028-2042 | |
| 4 | Jorge Aguirre* | 1.04 | 2015-2032 | |
| 7 | Pedro Alejándrez* | 1.05 | 2021-2034 | |
| 7 | Devin Hinton | 1.05 | 2013-2023 | |
| 7 | Gary Ashley# | 1.05 | 2035-2042 | |
| 10 | Ryan Ray | 1.07 | 2013-2021 | |
| 11 | John Wilkins* | 1.09 | 2013-2028 | |
| 11 | Edwin Ellis | 1.09 | 2013-2019 | |
| 13 | Ryan Davis* | 1.10 | 2015-2026 | |
| 13 | Todd Hines* | 1.10 | 2018-2032 | |
| 13 | Yoriyoshi Yamamoto | 1.10 | 2016-2026 | |
| 13 | Bruce Wright | 1.10 | 2020-2030 | |
| 17 | Jesús Caldero | 1.11 | 2018-2027 | |
| 17 | Jesús Franco | 1.11 | 2026-2033 | |
| 17 | Jim Eliott* | 1.11 | 2014-2025 | |
| 17 | Jesús Gonzáles | 1.11 | 2019-2030 | |
| 17 | Rhys Maskell# | 1.11 | 2035-2042 | |
| 22 | José Hernández | 1.12 | 2013-2023 | |
| 22 | Yuri Volkers | 1.12 | 2013-2021 | |
| 22 | Ramón Ortega* | 1.12 | 2013-2028 | |
| 22 | Sjaak Bonne | 1.12 | 2025-2041 | |
| 26 | Alec Pittman | 1.13 | 2016-2030 | |
| 26 | Lúcio Sánchez* | 1.13 | 2017-2031 | |
| 26 | Tom Reynolds* | 1.13 | 2015-2028 | |
| 26 | Cordell Wilson | 1.13 | 2019-2030 | |
| 30 | Iván García | 1.14 | 2021-2035 | |
| 30 | Tony Alfonso# | 1.14 | 2033-2042 | |
| 30 | Keisuke Nishida | 1.14 | 2029-2036 | |
| 33 | Raúl Areola | 1.16 | 2020-2033 | |
| 33 | Miguel Rubia | 1.16 | 2029-2040 | |
| 33 | John Kaufman* | 1.16 | 2017-2032 | |
| 33 | Raúl Gómez | 1.16 | 2027-2033 | |
| 37 | Andrew Moody# | 1.17 | 2032-2042 | |
| 37 | Jorge Otero | 1.17 | 2031-2041 | |
| 37 | Alejandro Guerra | 1.17 | 2027-2037 | |
| 40 | John Dempsey | 1.18 | 2022-2037 | |
| 40 | Aurelio López | 1.18 | 2022-2036 | |
| 40 | Vincent Hall | 1.18 | 2020-2032 | |
| 40 | Wes Hamm* | 1.18 | 2021-2037 | |
| 44 | Curtis Fields | 1.19 | 2016-2024 | |
| 44 | Burt Booth | 1.19 | 2013-2026 | |
| 44 | Cris Mendoza | 1.19 | 2013-2029 | |
| 44 | Chester Henry | 1.19 | 2016-2023 | |
| 48 | Edgardo Marín | 1.20 | 2013-2032 | |
| 48 | Eddie Kop | 1.20 | 2025-2042 | |
| 48 | Mimosa Joseph | 1.20 | 2023-2035 | |
| 51 | Luis Flores | 1.21 | 2024-2033 | |
| 51 | Germán Rodríguez | 1.21 | 2024-2039 | |
| 51 | Juan Júlio | 1.21 | 2013-2026 | |
| 54 | Wayne Craig | 1.22 | 2018-2030 | |
| 54 | Kenny Aarnoutse# | 1.22 | 2032-2042 | |
| 54 | Gerardo Pagán# | 1.22 | 2027-2042 | |
| 54 | Jaime van de Weideven | 1.22 | 2022-2038 | |
| 54 | Fraser Cuevas | 1.22 | 2020-2032 | |
| 54 | José García | 1.22 | 2022-2035 | |
| 60 | Firpo Marberry# | 1.23 | 2036-2042 | |
| 60 | Manuel Rojas | 1.23 | 2018-2028 | |
| 60 | Ramón Molina | 1.23 | 2026-2034 | |
| 60 | Wayne Hurst | 1.23 | 2015-2024 | |
| 60 | Sjoerd Reynoud# | 1.23 | 2034-2042 | |
| 65 | Pablo De La Torre | 1.24 | 2021-2038 | |
| 65 | Yoo-chul Mun | 1.24 | 2031-2039 | |
| 65 | Pat Farrell | 1.24 | 2013-2022 | |
| 68 | Kirby Brown | 1.25 | 2017-2029 | |
| 68 | George Frazier | 1.25 | 2019-2037 | |
| 70 | Ricardo García# | 1.26 | 2031-2042 | |
| 70 | Bill Fletcher | 1.26 | 2018-2025 | |
| 72 | Bill Oulton | 1.27 | 2021-2034 | |
| 72 | Pedro Ortíz | 1.27 | 2020-2038 | |
| 72 | Billy Crawford | 1.27 | 2014-2025 | |
| 75 | Enrique Cortéz | 1.28 | 2022-2032 | |
| 75 | Elroy Thompkins# | 1.28 | 2029-2041 | |
| 75 | Miguel Castillo | 1.28 | 2013-2020 | |
| 75 | Enrique Magana | 1.28 | 2013-2019 | |
| 79 | Juan Torres | 1.29 | 2023-2029 | |
| 79 | Cristián Moreno# | 1.29 | 2034-2042 | |
| 81 | Addie Samson | 1.30 | 2021-2035 | |
| 82 | Tobías Pérez | 1.31 | 2024-2037 | |
| 82 | Calvin Beck | 1.31 | 2026-2033 | |
| 84 | Sam Mooney | 1.32 | 2028-2040 | |
| 84 | Giovanni Mireles# | 1.32 | 2029-2041 | |
| 86 | Gerald Keller | 1.33 | 2030-2036 | |
| 87 | Josef van der Poel | 1.34 | 2019-2035 | |
| 88 | José Flores | 1.35 | 2019-2029 | |
| 89 | Natalino Golaio | 1.37 | 2023-2040 | |
| 89 | Ilie Paunescu | 1.37 | 2016-2035 | |
| 89 | José Cotilla# | 1.37 | 2032-2042 | |
| 92 | Ambrose Randall# | 1.38 | 2027-2039 | |
| 92 | Sy-ing Tah | 1.38 | 2030-2039 | |
| 92 | Yin-fat Foong | 1.38 | 2017-2029 | |
| 95 | Miguel Angel Martínez# | 1.39 | 2034-2042 | |
| 96 | Vern Camp | 1.40 | 2013-2022 | |
| 97 | Luis Peńa | 1.41 | 2025-2037 | |
| 97 | Robert Smalls# | 1.41 | 2036-2042 | |
| 99 | Cole Hall | 1.43 | 2013-2027 | |
| 99 | Pedro Ramírez | 1.43 | 2023-2032 |
