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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Juan Chávez | 0.65 | 2018-2020 | |
| 2 | Jaime Carrión | 0.69 | 2026-2030 | |
| 3 | William Johnson | 0.74 | 2013-2018 | |
| 4 | Juan Sánchez | 0.81 | 2020-2026 | |
| 5 | Joe Kehoe | 0.86 | 2022-2028 | |
| 6 | An Jang-Yop# | 0.87 | 2029-2039 | |
| 7 | António Vega | 0.88 | 2013-2023 | |
| 7 | Jesús Franco | 0.88 | 2026-2033 | |
| 9 | Yuri Volkers | 0.89 | 2013-2021 | |
| 10 | Torvald Geertsen | 0.91 | 2018-2024 | |
| 10 | Pancho Padilla | 0.91 | 2024-2030 | |
| 12 | Curtis Fields | 0.92 | 2016-2024 | |
| 13 | Maxime Janssens | 0.94 | 2030-2038 | |
| 13 | Alfonso Zapata | 0.94 | 2020-2034 | |
| 13 | Robinson Gonzáles | 0.94 | 2020-2031 | |
| 16 | Ted Locke | 0.95 | 2018-2026 | |
| 16 | Juan Guillén# | 0.95 | 2026-2039 | |
| 18 | Lúcio Sánchez* | 0.96 | 2017-2031 | |
| 19 | Mitchell Atwell# | 0.97 | 2027-2039 | |
| 19 | Branlyn Jaraba# | 0.97 | 2036-2039 | |
| 21 | Glenn Butler# | 0.98 | 2028-2038 | |
| 21 | Asher Spivey | 0.98 | 2027-2035 | |
| 21 | John Wilkins* | 0.98 | 2013-2028 | |
| 21 | Armando Garay# | 0.98 | 2031-2037 | |
| 25 | Ron Manning# | 0.99 | 2030-2039 | |
| 25 | Shigemasa Horiuchi* | 0.99 | 2019-2032 | |
| 25 | Cristián Moreno# | 0.99 | 2034-2039 | |
| 28 | John Kaufman* | 1.00 | 2017-2032 | |
| 28 | Brian Fixel# | 1.00 | 2028-2039 | |
| 28 | Armando Hernández | 1.00 | 2013-2018 | |
| 28 | Piotr Oja | 1.00 | 2030-2034 | |
| 28 | Todd Hines* | 1.00 | 2018-2032 | |
| 33 | Alejandro Guerra# | 1.01 | 2027-2037 | |
| 33 | Scott Morrison# | 1.01 | 2035-2038 | |
| 35 | Sam Mooney# | 1.02 | 2028-2039 | |
| 35 | Carlos Mata | 1.02 | 2018-2021 | |
| 37 | Dale Hamilton# | 1.03 | 2030-2038 | |
| 37 | Miguel Rubia# | 1.03 | 2029-2039 | |
| 37 | Darby Marshall# | 1.03 | 2034-2037 | |
| 37 | Keisuke Nishida | 1.03 | 2029-2036 | |
| 37 | Raúl Romero# | 1.03 | 2035-2039 | |
| 37 | Ken Hinkle | 1.03 | 2013-2026 | |
| 37 | Jason Starkey# | 1.03 | 2035-2039 | |
| 37 | Craig Gasnier | 1.03 | 2021-2023 | |
| 45 | José Ramos | 1.04 | 2014-2023 | |
| 45 | Javier Desdin# | 1.04 | 2025-2038 | |
| 45 | Yoriyoshi Sugimoto# | 1.04 | 2034-2039 | |
| 45 | Edgardo Marín | 1.04 | 2013-2032 | |
| 45 | Tom Reynolds* | 1.04 | 2015-2028 | |
| 45 | Ryan Davis* | 1.04 | 2015-2026 | |
| 45 | Bryan Houston | 1.04 | 2020-2024 | |
| 45 | Júlio Rodríguez# | 1.04 | 2023-2038 | |
| 45 | Cordell Wilson | 1.04 | 2019-2030 | |
| 45 | Yoriyoshi Yamamoto | 1.04 | 2016-2026 | |
| 55 | Bruce Wright | 1.05 | 2020-2030 | |
| 55 | Carlos Sánchez | 1.05 | 2022-2031 | |
| 55 | Brewster Warble# | 1.05 | 2030-2039 | |
| 55 | Leo Ingelbrigtsen# | 1.05 | 2034-2039 | |
| 59 | José Lucero | 1.06 | 2030-2039 | |
| 59 | Sozen Raikatuji | 1.06 | 2016-2023 | |
| 59 | Earnest Casey | 1.06 | 2018-2025 | |
| 59 | Don Thompson | 1.06 | 2017-2020 | |
| 59 | Edmund Blackadder# | 1.06 | 2034-2037 | |
| 59 | Ralph McKinney* | 1.06 | 2019-2034 | |
| 65 | Lorenzo Sánchez | 1.07 | 2021-2029 | |
| 65 | Dorian Daly | 1.07 | 2026-2035 | |
| 65 | Edwin Ellis | 1.07 | 2013-2019 | |
| 65 | Walt Coffman | 1.07 | 2026-2038 | |
| 69 | Alejandro Arteaga | 1.08 | 2024-2031 | |
| 69 | Allen Blair | 1.08 | 2021-2034 | |
| 69 | Kirby Buckner | 1.08 | 2025-2030 | |
| 69 | Jason Hubbell | 1.08 | 2020-2029 | |
| 69 | Gerald Orlebar# | 1.08 | 2036-2039 | |
| 69 | Wally Copeland# | 1.08 | 2028-2039 | |
| 69 | Kyung-un Yi | 1.08 | 2020-2030 | |
| 69 | Eijiro Takahashi | 1.08 | 2027-2034 | |
| 69 | Christian Bates | 1.08 | 2019-2022 | |
| 78 | Noe Toepfer# | 1.09 | 2037-2039 | |
| 78 | Sjaak Bonne# | 1.09 | 2025-2039 | |
| 78 | Jorge Aguirre* | 1.09 | 2015-2032 | |
| 78 | Brandon Bannatyne | 1.09 | 2017-2032 | |
| 78 | Jesús Gonzáles | 1.09 | 2019-2030 | |
| 78 | Lou Meadows | 1.09 | 2019-2027 | |
| 78 | Jesús Caldero | 1.09 | 2018-2027 | |
| 78 | Mark Valle# | 1.09 | 2028-2039 | |
| 78 | John Dempsey | 1.09 | 2022-2037 | |
| 87 | Wayne Hurst | 1.10 | 2015-2024 | |
| 87 | Eddie Kop# | 1.10 | 2025-2039 | |
| 87 | George Frazier | 1.10 | 2019-2037 | |
| 87 | Roberto Ortega | 1.10 | 2019-2020 | |
| 87 | Sicnarf Loopstok# | 1.10 | 2035-2039 | |
| 87 | Tobías Pérez# | 1.10 | 2024-2037 | |
| 87 | José Alaniz | 1.10 | 2019-2032 | |
| 87 | Yoo-chul Mun# | 1.10 | 2031-2039 | |
| 95 | Ryan Ray | 1.11 | 2013-2021 | |
| 95 | Kevin Nogilny# | 1.11 | 2032-2038 | |
| 95 | Juan Júlio | 1.11 | 2013-2026 | |
| 98 | Javier Dávila | 1.12 | 2024-2031 | |
| 98 | Juan Torres | 1.12 | 2023-2029 | |
| 98 | Nand Lal Chaudhary# | 1.12 | 2033-2039 |
