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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ernie Christian | 1.04 | 1990-2004 | |
| 2 | Craig Walker | 1.07 | 1991-1999 | |
| 2 | Kenny Bradley | 1.07 | 1998-2011 | |
| 4 | Félix Rodríguez | 1.08 | 1992-2008 | |
| 5 | Ricardo Díaz | 1.11 | 2000-2010 | |
| 5 | Bryan Banks | 1.11 | 1998-2002 | |
| 7 | Henry Bader | 1.12 | 1999-2012 | |
| 8 | Jorge Herrera | 1.15 | 1995-2002 | |
| 9 | Ángel Ramírez | 1.16 | 1993-2000 | |
| 9 | Larry Daig# | 1.16 | 2065-2075 | |
| 9 | Josh Gesler | 1.16 | 2044-2057 | |
| 12 | Dave Callahan | 1.17 | 2039-2050 | |
| 12 | James Barry | 1.17 | 2000-2006 | |
| 12 | Sterling Lee | 1.17 | 2003-2011 | |
| 15 | Les Saunders | 1.18 | 1990-1998 | |
| 15 | Chris Hanson | 1.18 | 2003-2011 | |
| 17 | Alberto García | 1.19 | 2034-2048 | |
| 17 | Roberto Martinez | 1.19 | 2067-2075 | |
| 17 | Boyd Burnett | 1.19 | 1997-2001 | |
| 17 | John Dixon | 1.19 | 1991-1998 | |
| 17 | Hiroshige Uchida | 1.19 | 2000-2018 | |
| 17 | Ricardo Tobías | 1.19 | 1997-2002 | |
| 23 | Juan Núñez | 1.20 | 1990-1996 | |
| 23 | Joe Coffman | 1.20 | 2000-2017 | |
| 23 | Micheal Schmidt | 1.20 | 1990-1995 | |
| 23 | Gabriel González | 1.20 | 2007-2018 | |
| 23 | Aaron Lawson | 1.20 | 1993-1999 | |
| 23 | Aaron Carter | 1.20 | 2011-2021 | |
| 23 | Luis Marulnda | 1.20 | 1990-2000 | |
| 30 | David Ford | 1.21 | 2011-2016 | |
| 30 | Dan Burford | 1.21 | 2030-2037 | |
| 30 | Teodor Reyes | 1.21 | 1999-2008 | |
| 30 | Enrique Colón | 1.21 | 2028-2035 | |
| 30 | Mushanokoji Kubo | 1.21 | 2049-2064 | |
| 30 | Lou Whitehead | 1.21 | 2002-2016 | |
| 36 | Francisco Marés | 1.22 | 1994-2004 | |
| 36 | Dave Thomas | 1.22 | 2000-2004 | |
| 36 | Nolan Park | 1.22 | 2029-2038 | |
| 36 | Juan Cardenas | 1.22 | 2000-2010 | |
| 40 | Dan Winston | 1.23 | 2013-2026 | |
| 41 | Joel Curtis | 1.24 | 1993-2004 | |
| 41 | Arthur Day | 1.24 | 2000-2013 | |
| 41 | Miguel Vásquez | 1.24 | 2005-2018 | |
| 41 | Warner Cavanagh | 1.24 | 2044-2062 | |
| 41 | Kinji Gato | 1.24 | 2026-2034 | |
| 41 | António Alvarado | 1.24 | 1990-1996 | |
| 41 | Vaughn Gibson | 1.24 | 1997-2007 | |
| 41 | Jorge Ochoa | 1.24 | 2017-2023 | |
| 41 | Gjelt van den Bovenkamp | 1.24 | 2061-2069 | |
| 50 | Seth Slade | 1.25 | 2029-2044 | |
| 50 | Masaaki Araki | 1.25 | 2058-2068 | |
| 50 | George Schroeder | 1.25 | 1990-1995 | |
| 50 | Suketsune Yamamoto | 1.25 | 2017-2030 | |
| 50 | Nate Anthony | 1.25 | 2024-2035 | |
| 50 | Vidal Martínez | 1.25 | 2003-2014 | |
| 50 | Alrigo Occhena | 1.25 | 2046-2056 | |
| 50 | José Chávez | 1.25 | 1994-2001 | |
| 58 | Matt Roberts | 1.26 | 2004-2016 | |
| 58 | Norbert Kooiman | 1.26 | 2024-2036 | |
| 58 | Juan Jose Villegas | 1.26 | 2051-2065 | |
| 58 | Fred Lee | 1.26 | 1998-2002 | |
| 58 | Jorge Blanco | 1.26 | 2032-2045 | |
| 58 | Juan Núñez | 1.26 | 2000-2007 | |
| 58 | Chris Barrett | 1.26 | 1990-1995 | |
| 65 | Jared Small | 1.27 | 2040-2050 | |
| 65 | Ken Pilgrim | 1.27 | 2018-2025 | |
| 65 | Brendon Terry | 1.27 | 2010-2017 | |
| 65 | Andrew Cramer | 1.27 | 2033-2040 | |
| 65 | Jeff Justice | 1.27 | 2002-2010 | |
| 65 | Thomas Barrett | 1.27 | 2009-2018 | |
| 65 | Neville Roosemont | 1.27 | 2053-2067 | |
| 65 | Elwood Bruce# | 1.27 | 2062-2075 | |
| 73 | Juan Pérez | 1.28 | 1997-2005 | |
| 73 | Bob Warren | 1.28 | 1993-2006 | |
| 73 | Mike Ashley | 1.28 | 2005-2012 | |
| 73 | Duncan Knudson | 1.28 | 2004-2009 | |
| 73 | Santiago Contreras | 1.28 | 1990-1995 | |
| 78 | Jesús Rivera | 1.29 | 1999-2008 | |
| 78 | Danny Ottamendi | 1.29 | 2053-2061 | |
| 78 | Francisco Martínez | 1.29 | 2045-2054 | |
| 78 | Sam McFarland | 1.29 | 1991-1999 | |
| 78 | Ken Palmer | 1.29 | 1990-2000 | |
| 78 | Phil Pape | 1.29 | 1993-1998 | |
| 78 | Carlos Gonzáles | 1.29 | 2042-2051 | |
| 78 | José De Los Santos | 1.29 | 1990-1995 | |
| 78 | Brandon Benoit | 1.29 | 2035-2051 | |
| 78 | Tracy Moore | 1.29 | 2000-2010 | |
| 78 | Naruhiko Abe | 1.29 | 2028-2039 | |
| 89 | Gerald Sullivan | 1.30 | 2024-2033 | |
| 89 | Jason Rogers | 1.30 | 2038-2047 | |
| 89 | Francisco Hernández | 1.30 | 2046-2056 | |
| 89 | Franky Santegoeds | 1.30 | 2053-2065 | |
| 89 | Roman Mathias | 1.30 | 2025-2036 | |
| 89 | Jeff MacDade | 1.30 | 2023-2036 | |
| 89 | Dusty Hicks# | 1.30 | 2067-2075 | |
| 89 | Brian Oglethorpe | 1.30 | 2003-2011 | |
| 89 | Bartolomeo Masini | 1.30 | 2053-2063 | |
| 89 | Julian Phillips | 1.30 | 2004-2014 | |
| 99 | Nazario Vercesi | 1.31 | 2030-2040 | |
| 99 | Luis Delgado | 1.31 | 2020-2034 |
