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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ricardo Pérez* | 0.93 | 2022-2039 | |
| 2 | José Gómez | 0.94 | 2024-2039 | |
| 3 | Yakamochi Suitani* | 0.97 | 2021-2034 | |
| 3 | Bob Burns# | 0.97 | 2023-2042 | |
| 5 | Chris York* | 0.98 | 2012-2028 | |
| 5 | Edgardo Trevino# | 0.98 | 2033-2042 | |
| 7 | Adrian Peterson | 0.99 | 2015-2027 | |
| 7 | Hen-to Tse# | 0.99 | 2035-2042 | |
| 7 | Jim Ratzlaff | 0.99 | 2014-2030 | |
| 10 | Luppe van Dam# | 1.00 | 2029-2042 | |
| 10 | Michel Provost* | 1.00 | 2016-2030 | |
| 10 | Matt Brown | 1.00 | 2025-2040 | |
| 13 | Víctor Matos | 1.01 | 2007-2016 | |
| 14 | Roberto Rivera# | 1.03 | 2032-2042 | |
| 14 | Cheh Zhang# | 1.03 | 2034-2042 | |
| 16 | Manuel Corona* | 1.04 | 2012-2028 | |
| 16 | Markus Hancock* | 1.04 | 2008-2026 | |
| 16 | Cheong-sang Yun# | 1.04 | 2031-2042 | |
| 19 | Gustavo Hernández# | 1.05 | 2029-2042 | |
| 19 | Bill Gallagher | 1.05 | 2017-2033 | |
| 21 | Alfredo Aranda | 1.06 | 2016-2036 | |
| 21 | Fernando Valdéz# | 1.06 | 2036-2042 | |
| 21 | Gunner MacGruder* | 1.06 | 2014-2029 | |
| 24 | Ángel Valdéz | 1.07 | 2027-2037 | |
| 24 | José Hernández# | 1.07 | 2036-2042 | |
| 24 | Bartolo García | 1.07 | 2025-2035 | |
| 27 | Dean McNeil | 1.08 | 2023-2038 | |
| 27 | Brenden Clymo# | 1.08 | 2033-2042 | |
| 27 | Jeffrey Mendoza# | 1.08 | 2028-2042 | |
| 27 | John Turner | 1.08 | 2021-2037 | |
| 27 | Enrique Vázquez* | 1.08 | 2024-2037 | |
| 27 | Seong-chin Kim# | 1.08 | 2036-2042 | |
| 27 | Juan Acosta# | 1.08 | 2029-2042 | |
| 27 | Shane Perales# | 1.08 | 2034-2042 | |
| 27 | David Chesney | 1.08 | 2013-2028 | |
| 36 | Carmelo Lamberti# | 1.09 | 2033-2042 | |
| 36 | Jim MacCowan | 1.09 | 2023-2038 | |
| 36 | Manuel López | 1.09 | 2030-2037 | |
| 36 | Pat Willis# | 1.09 | 2028-2038 | |
| 36 | George Moss# | 1.09 | 2032-2042 | |
| 36 | Ernesto Molina | 1.09 | 2021-2035 | |
| 36 | Alfredo Velázquez | 1.09 | 2014-2026 | |
| 43 | Juan Guerrero# | 1.10 | 2031-2041 | |
| 43 | Ronald Turton | 1.10 | 2029-2037 | |
| 43 | Fred Benjamin* | 1.10 | 2014-2029 | |
| 43 | Arturo Acevedo# | 1.10 | 2035-2042 | |
| 43 | Hiroyuki Nii | 1.10 | 2014-2024 | |
| 43 | Jorge Medina | 1.10 | 2027-2038 | |
| 43 | Clark Snow | 1.10 | 2022-2031 | |
| 43 | Norm Batstone# | 1.10 | 2029-2042 | |
| 43 | Manuel Pacheco | 1.10 | 2021-2034 | |
| 52 | Raúl Cruz# | 1.11 | 2035-2042 | |
| 52 | Manuel Ávila# | 1.11 | 2031-2039 | |
| 52 | Fernando Castro | 1.11 | 2028-2037 | |
| 52 | Masakazu Nishimura | 1.11 | 2028-2038 | |
| 52 | René Padilla# | 1.11 | 2035-2042 | |
| 52 | Félix Reyes | 1.11 | 2026-2036 | |
| 52 | Ty Evans | 1.11 | 2029-2036 | |
| 52 | Thibault Dejean# | 1.11 | 2037-2042 | |
| 52 | Volmer Buscher# | 1.11 | 2030-2042 | |
| 52 | Xiao-mei Cheung# | 1.11 | 2035-2042 | |
| 52 | Owen Barse# | 1.11 | 2030-2042 | |
| 52 | Dean O'Monahan* | 1.11 | 2007-2022 | |
| 52 | Brian Clark# | 1.11 | 2032-2042 | |
| 52 | Armando Gallegos | 1.11 | 2009-2024 | |
| 52 | Erik Watson | 1.11 | 2026-2038 | |
| 52 | Randy Zimmerman# | 1.11 | 2026-2039 | |
| 68 | Bang-xao Niu# | 1.12 | 2031-2042 | |
| 68 | Dave Parkinson | 1.12 | 2021-2030 | |
| 68 | Duane Moss# | 1.12 | 2031-2042 | |
| 68 | Aaron Goater# | 1.12 | 2037-2042 | |
| 68 | Luis Mora | 1.12 | 2007-2022 | |
| 68 | Tetsui Suzuki# | 1.12 | 2037-2042 | |
| 68 | Luigi Bright | 1.12 | 2020-2035 | |
| 75 | Pedro Barrón | 1.13 | 2010-2016 | |
| 75 | Kiyohira Goto# | 1.13 | 2037-2042 | |
| 75 | Kensaku Gato | 1.13 | 2021-2037 | |
| 75 | Raúl Cruz | 1.13 | 2016-2032 | |
| 75 | José Ojeda# | 1.13 | 2035-2042 | |
| 75 | Randy Smith* | 1.13 | 2016-2032 | |
| 75 | Manuel Gonzáles# | 1.13 | 2029-2042 | |
| 75 | Dave Barker | 1.13 | 2013-2021 | |
| 75 | Leonard Carver | 1.13 | 2016-2029 | |
| 75 | Francisco Robles* | 1.13 | 2012-2030 | |
| 75 | Roberto Cisneros | 1.13 | 2030-2039 | |
| 75 | José Cruz | 1.13 | 2007-2018 | |
| 75 | Ji-chol Yun# | 1.13 | 2030-2040 | |
| 75 | Kyle Colquhoun# | 1.13 | 2035-2042 | |
| 75 | Cedric Mosley | 1.13 | 2007-2018 | |
| 75 | Edgardo Guerra | 1.13 | 2026-2036 | |
| 75 | David Tucker | 1.13 | 2027-2038 | |
| 92 | Keitaro Kodo | 1.14 | 2012-2017 | |
| 92 | Mang Sun# | 1.14 | 2034-2042 | |
| 92 | Scotty Shorland# | 1.14 | 2030-2040 | |
| 92 | Richard Neely | 1.14 | 2026-2040 | |
| 92 | Nelson Anderson | 1.14 | 2007-2017 | |
| 92 | Henry Carter | 1.14 | 2028-2038 | |
| 92 | Clayton Lewis | 1.14 | 2016-2032 | |
| 92 | Martín Ramírez | 1.14 | 2025-2033 | |
| 92 | Juan López# | 1.14 | 2027-2042 |
