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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 | Ron Rouse# | 0.78 | 2038-2044 | |
| 5 | Juan Sánchez | 0.81 | 2020-2026 | |
| 6 | Kenji Aoki | 0.85 | 2035-2042 | |
| 6 | Jared LaBarge# | 0.85 | 2040-2044 | |
| 8 | Joe Kehoe | 0.86 | 2022-2028 | |
| 9 | Derek May# | 0.87 | 2041-2044 | |
| 10 | António Vega | 0.88 | 2013-2023 | |
| 10 | Jesús Franco | 0.88 | 2026-2033 | |
| 12 | Yuri Volkers | 0.89 | 2013-2021 | |
| 13 | Seong-hyeon Yi# | 0.90 | 2038-2044 | |
| 13 | Taalay Ibragimov# | 0.90 | 2034-2043 | |
| 15 | Torvald Geertsen | 0.91 | 2018-2024 | |
| 15 | Pancho Padilla | 0.91 | 2024-2030 | |
| 17 | Joe Khokar# | 0.92 | 2034-2044 | |
| 17 | Curtis Fields | 0.92 | 2016-2024 | |
| 19 | Raúl Romero# | 0.93 | 2035-2044 | |
| 20 | Maxime Janssens | 0.94 | 2030-2038 | |
| 20 | Alfonso Zapata | 0.94 | 2020-2034 | |
| 20 | Robinson Gonzáles | 0.94 | 2020-2031 | |
| 23 | Ted Locke | 0.95 | 2018-2026 | |
| 24 | Lúcio Sánchez* | 0.96 | 2017-2031 | |
| 24 | Nicky Bogdan# | 0.96 | 2038-2044 | |
| 26 | Mitchell Atwell | 0.97 | 2027-2039 | |
| 26 | Brewster Warble# | 0.97 | 2030-2044 | |
| 28 | Glenn Butler | 0.98 | 2028-2038 | |
| 28 | Asher Spivey | 0.98 | 2027-2035 | |
| 28 | John Wilkins* | 0.98 | 2013-2028 | |
| 31 | Shigemasa Horiuchi* | 0.99 | 2019-2032 | |
| 32 | John Kaufman* | 1.00 | 2017-2032 | |
| 32 | Brian Fixel | 1.00 | 2028-2039 | |
| 32 | Armando Hernández | 1.00 | 2013-2018 | |
| 32 | Piotr Oja | 1.00 | 2030-2034 | |
| 32 | Todd Hines* | 1.00 | 2018-2032 | |
| 37 | Alejandro Guerra | 1.01 | 2027-2037 | |
| 37 | Jesús Vidro# | 1.01 | 2034-2044 | |
| 39 | Jelexiz Verano# | 1.02 | 2039-2044 | |
| 39 | Carlos Mata | 1.02 | 2018-2021 | |
| 39 | Gary Ashley# | 1.02 | 2035-2044 | |
| 42 | Sam Mooney | 1.03 | 2028-2040 | |
| 42 | Zhao-ji Qiu# | 1.03 | 2035-2044 | |
| 42 | Darby Marshall | 1.03 | 2034-2037 | |
| 42 | Keisuke Nishida | 1.03 | 2029-2036 | |
| 42 | Ken Hinkle | 1.03 | 2013-2026 | |
| 42 | Hong-bin Hua# | 1.03 | 2039-2043 | |
| 42 | Brantford Winstworth III# | 1.03 | 2029-2044 | |
| 42 | Craig Gasnier | 1.03 | 2021-2023 | |
| 42 | Shigochiyo Tanaka# | 1.03 | 2042-2043 | |
| 51 | Ron Manning | 1.04 | 2030-2041 | |
| 51 | Dale Hamilton | 1.04 | 2030-2042 | |
| 51 | José Ramos | 1.04 | 2014-2023 | |
| 51 | Edgardo Marín | 1.04 | 2013-2032 | |
| 51 | Tom Reynolds* | 1.04 | 2015-2028 | |
| 51 | Ryan Davis* | 1.04 | 2015-2026 | |
| 51 | Bryan Houston | 1.04 | 2020-2024 | |
| 51 | Cordell Wilson | 1.04 | 2019-2030 | |
| 51 | Yoriyoshi Yamamoto | 1.04 | 2016-2026 | |
| 51 | An Jang-Yop | 1.04 | 2029-2043 | |
| 51 | Kent Good# | 1.04 | 2036-2044 | |
| 62 | Bruce Wright | 1.05 | 2020-2030 | |
| 62 | Carlos Sánchez | 1.05 | 2022-2031 | |
| 62 | Javier Ariza# | 1.05 | 2038-2044 | |
| 62 | Leo Ingelbrigtsen# | 1.05 | 2034-2044 | |
| 66 | Javier Desdin | 1.06 | 2025-2042 | |
| 66 | José Lucero | 1.06 | 2030-2039 | |
| 66 | Armando Garay | 1.06 | 2031-2040 | |
| 66 | Sozen Raikatuji* | 1.06 | 2016-2023 | |
| 66 | Earnest Casey | 1.06 | 2018-2025 | |
| 66 | Don Thompson | 1.06 | 2017-2020 | |
| 66 | Jeff Mahl# | 1.06 | 2035-2044 | |
| 66 | Edmund Blackadder# | 1.06 | 2034-2037 | |
| 66 | Ralph McKinney* | 1.06 | 2019-2034 | |
| 75 | Lorenzo Sánchez | 1.07 | 2021-2029 | |
| 75 | Dorian Daly | 1.07 | 2026-2035 | |
| 75 | Edwin Ellis | 1.07 | 2013-2019 | |
| 75 | Walt Coffman* | 1.07 | 2026-2038 | |
| 75 | Amberlan Romubio# | 1.07 | 2038-2044 | |
| 75 | Júlio Rodríguez | 1.07 | 2023-2041 | |
| 81 | Juan Guillén | 1.08 | 2026-2041 | |
| 81 | Alejandro Arteaga | 1.08 | 2024-2031 | |
| 81 | Allen Blair | 1.08 | 2021-2034 | |
| 81 | Kirby Buckner | 1.08 | 2025-2030 | |
| 81 | Jason Hubbell | 1.08 | 2020-2029 | |
| 81 | Miguel Rubia | 1.08 | 2029-2040 | |
| 81 | Jesús Silva# | 1.08 | 2039-2044 | |
| 81 | Kyung-un Yi | 1.08 | 2020-2030 | |
| 81 | Eijiro Takahashi | 1.08 | 2027-2034 | |
| 81 | Denie Ulderink# | 1.08 | 2037-2044 | |
| 81 | Christian Bates | 1.08 | 2019-2022 | |
| 92 | Noe Toepfer | 1.09 | 2037-2039 | |
| 92 | Jorge Aguirre* | 1.09 | 2015-2032 | |
| 92 | Dusty Fox# | 1.09 | 2035-2044 | |
| 92 | Brandon Bannatyne | 1.09 | 2017-2032 | |
| 92 | Mike Donovan# | 1.09 | 2040-2044 | |
| 92 | Jesús Gonzáles* | 1.09 | 2019-2030 | |
| 92 | Lou Meadows | 1.09 | 2019-2027 | |
| 92 | Branlyn Jaraba# | 1.09 | 2036-2044 | |
| 92 | Jesús Caldero | 1.09 | 2018-2027 |
