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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Sean Hopkins | 0.62 | 2003 | |
| 2 | Jeremiah Burrowes | 0.68 | 1989 | |
| 2 | Rafael Serrano# | 0.68 | 2008 | |
| 4 | Jorge Rivera | 0.69 | 1976 | |
| 4 | Pedro Sierra | 0.69 | 1995 | |
| 6 | Rafael Ruíz# | 0.71 | 2010 | |
| 6 | Johnny Hicks | 0.71 | 1994 | |
| 8 | Joe Evans# | 0.72 | 2014 | |
| 8 | Sherwood Aguilar | 0.72 | 1996 | |
| 8 | Richard Towns | 0.72 | 1986 | |
| 8 | Nick Inman | 0.72 | 1992 | |
| 12 | Mark Fulton | 0.73 | 1991 | |
| 12 | Jessie Walker | 0.73 | 1999 | |
| 12 | Larry Williams | 0.73 | 1959 | |
| 15 | Stephen Sanders | 0.74 | 1975 | |
| 15 | António Miranda | 0.74 | 1995 | |
| 17 | Christian Piper | 0.75 | 2008 | |
| 17 | Ángel Rodríguez | 0.75 | 1996 | |
| 17 | Sherwood Aguilar | 0.75 | 1997 | |
| 20 | Juan Moreno | 0.76 | 1982 | |
| 20 | William Lloyd# | 0.76 | 2004 | |
| 20 | Zach Lee | 0.76 | 1972 | |
| 23 | Arnie Drake | 0.77 | 1995 | |
| 23 | Aurelio Galindo | 0.77 | 1977 | |
| 23 | Jessie Walker | 0.77 | 1998 | |
| 23 | Gonzalo Delgado | 0.77 | 1994 | |
| 27 | Carlos Morales | 0.78 | 1973 | |
| 27 | Ze-min Wang | 0.78 | 1996 | |
| 29 | Chris Schmidt# | 0.79 | 2013 | |
| 29 | Mark Miller | 0.79 | 2004 | |
| 29 | Francisco Silva# | 0.79 | 2012 | |
| 32 | Jonathan Jensen | 0.80 | 1992 | |
| 32 | Dave Ortega | 0.80 | 1997 | |
| 32 | Ron Preston# | 0.80 | 2007 | |
| 32 | Eduardo Núñez# | 0.80 | 2012 | |
| 32 | Ken Mack | 0.80 | 1979 | |
| 32 | Ash Wilson# | 0.80 | 2007 | |
| 32 | Dylan Seals | 0.80 | 1978 | |
| 32 | Richard Jones | 0.80 | 1969 | |
| 32 | Clint Graves | 0.80 | 1973 | |
| 32 | Stan Evans# | 0.80 | 2008 | |
| 32 | Rafael Rosário | 0.80 | 1996 | |
| 43 | Joaquín Gines | 0.81 | 1991 | |
| 43 | Shichirobei Matsuoka | 0.81 | 1975 | |
| 43 | Carlos De Jesús | 0.81 | 1968 | |
| 43 | William Crandell | 0.81 | 1998 | |
| 43 | José Rodríguez# | 0.81 | 2013 | |
| 43 | Francisco Benítez | 0.81 | 1996 | |
| 43 | Gabriel Ordóñez# | 0.81 | 2001 | |
| 43 | Sherwood Aguilar | 0.81 | 1995 | |
| 43 | Júlio López | 0.81 | 2009 | |
| 43 | Francisco Villalobos# | 0.81 | 2014 | |
| 53 | Steve Joyce# | 0.82 | 2008 | |
| 53 | Mike King | 0.82 | 1994 | |
| 53 | Dustin Jackson | 0.82 | 1991 | |
| 53 | Ron López# | 0.82 | 2009 | |
| 53 | Salvador Olvera | 0.82 | 1990 | |
| 53 | Chris Sanders | 0.82 | 1996 | |
| 53 | Tim Gibson | 0.82 | 1966 | |
| 53 | Scott Bennett | 0.82 | 1959 | |
| 53 | Ángel Rodríguez | 0.82 | 1995 | |
| 62 | Stephen Sanders | 0.83 | 1974 | |
| 62 | Raúl Mota | 0.83 | 1993 | |
| 62 | Adam Long | 0.83 | 1987 | |
| 62 | José Carrillo | 0.83 | 1991 | |
| 62 | Roger Patterson | 0.83 | 1992 | |
| 67 | Greg Castillo | 0.84 | 1986 | |
| 67 | Joe Boswell# | 0.84 | 2014 | |
| 67 | Dave Robinson# | 0.84 | 2013 | |
| 67 | Tony Ramírez | 0.84 | 2000 | |
| 67 | Júlio Rocha# | 0.84 | 1999 | |
| 67 | Nate Lindsey | 0.84 | 1998 | |
| 67 | Juan Gonzáles# | 0.84 | 2011 | |
| 67 | José Escobar | 0.84 | 1981 | |
| 67 | Raúl Rodríguez | 0.84 | 1969 | |
| 67 | Jorge Encarnación | 0.84 | 1974 | |
| 67 | Gustavo Vela | 0.84 | 1973 | |
| 67 | Michael Lewis# | 0.84 | 2003 | |
| 67 | Mark Lowe# | 0.84 | 2014 | |
| 67 | Will Solís# | 0.84 | 2014 | |
| 67 | John Spens | 0.84 | 1979 | |
| 82 | Wilson Murphy# | 0.85 | 2014 | |
| 82 | Pete England# | 0.85 | 2003 | |
| 82 | Carlos Moreno# | 0.85 | 2007 | |
| 82 | Tyler Walker | 0.85 | 1994 | |
| 82 | Jeff Parker | 0.85 | 1995 | |
| 87 | Edward López# | 0.86 | 2001 | |
| 87 | Collin Baker | 0.86 | 1973 | |
| 87 | Bill Vélez | 0.86 | 1999 | |
| 87 | Jesús Garza | 0.86 | 2002 | |
| 87 | John Huxtable | 0.86 | 1968 | |
| 87 | Steve Brown# | 0.86 | 2009 | |
| 87 | Millard Castaneda | 0.86 | 1985 | |
| 94 | Ricardo Gutérrez | 0.87 | 2000 | |
| 94 | Norm Farley | 0.87 | 1980 | |
| 94 | Dan Neal# | 0.87 | 2012 | |
| 94 | António Herrera | 0.87 | 1999 | |
| 94 | Michael Stroud# | 0.87 | 2013 | |
| 94 | Jesús De La Rosa | 0.87 | 1986 | |
| 94 | Albert Patton# | 0.87 | 2014 |
