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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Ding-bong Zhu# | 0.65 | 2038-2042 | |
| 2 | Héctor Rodríguez | 0.69 | 2007-2017 | |
| 3 | Jim Ratzlaff | 0.74 | 2014-2030 | |
| 4 | António López | 0.76 | 2016-2026 | |
| 5 | Brian Gutiérrez# | 0.80 | 2030-2039 | |
| 6 | Markus Hancock* | 0.83 | 2008-2026 | |
| 7 | Brock Southey# | 0.86 | 2039-2042 | |
| 8 | Gonzalo López | 0.87 | 2017-2027 | |
| 9 | Takahiro Takaki | 0.89 | 2021-2033 | |
| 10 | Jeffrey Mendoza# | 0.90 | 2028-2042 | |
| 10 | Michel Provost* | 0.90 | 2016-2030 | |
| 10 | Scotty Shorland# | 0.90 | 2030-2040 | |
| 13 | Yakamochi Suitani* | 0.92 | 2021-2034 | |
| 14 | Jonathan Francis | 0.94 | 2020-2030 | |
| 14 | Luis Gusmán | 0.94 | 2016-2028 | |
| 16 | Hamilton Cole | 0.95 | 2007-2019 | |
| 16 | Matt Benham | 0.95 | 2018-2027 | |
| 18 | Anastasio López | 0.96 | 2014-2028 | |
| 18 | Víctor Matos | 0.96 | 2007-2016 | |
| 20 | Luis Jiménez# | 0.97 | 2034-2040 | |
| 20 | Félix Garza | 0.97 | 2019-2027 | |
| 20 | Jesús López | 0.97 | 2027-2037 | |
| 23 | Cheong-sang Yun# | 0.98 | 2031-2042 | |
| 23 | José Hernández | 0.98 | 2020-2033 | |
| 23 | José López# | 0.98 | 2033-2042 | |
| 26 | Eric Perkins | 0.99 | 2023-2031 | |
| 26 | John Gray | 0.99 | 2021-2033 | |
| 26 | Edgardo Díaz | 0.99 | 2021-2031 | |
| 26 | Clayton Lewis | 0.99 | 2016-2032 | |
| 26 | Edgardo Trevino# | 0.99 | 2033-2042 | |
| 31 | Kenny Ashley | 1.00 | 2017-2036 | |
| 31 | Gunner MacGruder* | 1.00 | 2014-2029 | |
| 33 | Luppe van Dam# | 1.01 | 2029-2042 | |
| 33 | Dylan Mcintosh | 1.01 | 2027-2037 | |
| 33 | René Padilla# | 1.01 | 2035-2042 | |
| 36 | Matt Brown | 1.02 | 2025-2040 | |
| 36 | Lúcio Rodríguez | 1.02 | 2018-2031 | |
| 36 | Alfonso Ramos# | 1.02 | 2028-2039 | |
| 36 | Kyoichi Yoshimura | 1.02 | 2021-2025 | |
| 36 | Félix Maese | 1.02 | 2014-2027 | |
| 36 | Juan López# | 1.02 | 2027-2042 | |
| 42 | Brenden Clymo# | 1.03 | 2033-2042 | |
| 42 | Miguel Boroa# | 1.03 | 2037-2042 | |
| 42 | Jo Takahashi# | 1.03 | 2036-2042 | |
| 42 | Gustavo Hernández# | 1.03 | 2029-2042 | |
| 42 | Alberto Semblano | 1.03 | 2007-2021 | |
| 42 | Juan Acosta# | 1.03 | 2029-2042 | |
| 42 | Greg Bowen# | 1.03 | 2029-2039 | |
| 42 | Randy Smith* | 1.03 | 2016-2032 | |
| 50 | Simon Yates | 1.04 | 2007-2017 | |
| 50 | Iwao Maruyama | 1.04 | 2027-2038 | |
| 50 | Manuel Corona* | 1.04 | 2012-2028 | |
| 50 | Raúl Cruz# | 1.04 | 2035-2042 | |
| 54 | Roberto Rivera# | 1.05 | 2032-2042 | |
| 54 | Toby Ayers# | 1.05 | 2027-2042 | |
| 54 | Felipe Lara | 1.05 | 2007-2012 | |
| 54 | Adrian Peterson | 1.05 | 2015-2027 | |
| 58 | Motoyuki Hatsutori | 1.06 | 2024-2033 | |
| 58 | Earl Lucas# | 1.06 | 2034-2042 | |
| 58 | Chris York* | 1.06 | 2012-2028 | |
| 58 | Ricardo Pérez* | 1.06 | 2022-2039 | |
| 58 | Juan Jose Patino | 1.06 | 2025-2036 | |
| 63 | Dave Jones | 1.07 | 2022-2032 | |
| 63 | Jim MacCowan | 1.07 | 2023-2038 | |
| 63 | Martín Hernández# | 1.07 | 2036-2042 | |
| 63 | Geoffrey Bowman# | 1.07 | 2036-2042 | |
| 63 | Jhong-shun Kong | 1.07 | 2017-2029 | |
| 63 | Félix Ortega | 1.07 | 2011-2020 | |
| 63 | Armando Gallegos | 1.07 | 2009-2024 | |
| 63 | Shunsen Ueda | 1.07 | 2021-2029 | |
| 63 | Ogai Ono# | 1.07 | 2032-2039 | |
| 63 | Ángel Valdéz | 1.07 | 2027-2037 | |
| 73 | Curt Turner | 1.08 | 2015-2025 | |
| 73 | Owen Barse# | 1.08 | 2030-2042 | |
| 73 | Bill Gallagher | 1.08 | 2017-2033 | |
| 73 | Erwin Callahan | 1.08 | 2018-2027 | |
| 73 | Duane Moss# | 1.08 | 2031-2042 | |
| 78 | John Matthews | 1.09 | 2014-2023 | |
| 78 | Bob Burns# | 1.09 | 2023-2042 | |
| 78 | Ramón Contreras | 1.09 | 2015-2029 | |
| 78 | Francisco Encarn | 1.09 | 2014-2024 | |
| 78 | George Moss# | 1.09 | 2032-2042 | |
| 78 | Roberto Bustamente | 1.09 | 2012-2025 | |
| 84 | Allen Cook | 1.10 | 2026-2035 | |
| 84 | Colin Hopps | 1.10 | 2031-2037 | |
| 84 | Alfredo Aranda | 1.10 | 2016-2036 | |
| 87 | Clark Snow | 1.11 | 2022-2031 | |
| 87 | Clancy O'connell | 1.11 | 2007-2019 | |
| 87 | John Ross# | 1.11 | 2031-2042 | |
| 87 | Eduardo Romano | 1.11 | 2022-2032 | |
| 91 | Valentim Ornelas | 1.12 | 2022-2030 | |
| 91 | Cedric Mosley | 1.12 | 2007-2018 | |
| 91 | Avery Carson | 1.12 | 2016-2027 | |
| 91 | Kiyohira Goto# | 1.12 | 2037-2042 | |
| 91 | Tsuramatsu Ito | 1.12 | 2018-2033 | |
| 91 | Octávio Rivera | 1.12 | 2017-2021 | |
| 97 | Fernando Castro | 1.13 | 2028-2037 | |
| 97 | Conan McCullough* | 1.13 | 2007-2018 | |
| 99 | Masamichi Goto# | 1.14 | 2038-2042 | |
| 100 | Kensaku Gato | 1.15 | 2021-2037 |
