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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Andrew Sullivan | 0.86 | 1987-1999 | |
| 1 | Terence Washington | 0.86 | 1988-2000 | |
| 3 | Enrique Ortíz | 0.90 | 2001-2014 | |
| 4 | Nelson Padilla | 0.92 | 1999-2014 | |
| 5 | Chad Phillips | 0.93 | 1993-2001 | |
| 6 | Phil Longchamps# | 0.94 | 2005-2015 | |
| 6 | Brad Brooks | 0.94 | 1999-2009 | |
| 8 | Alejandro Pérez | 0.95 | 1991-1999 | |
| 8 | Bob Hubbard | 0.95 | 2002-2013 | |
| 8 | Roger Patterson | 0.95 | 1993-1999 | |
| 8 | António Arenas | 0.95 | 1999-2004 | |
| 12 | Edwin Miller# | 0.96 | 2006-2014 | |
| 12 | Román Manuel | 0.96 | 1994-2010 | |
| 12 | Domingo López# | 0.96 | 2002-2015 | |
| 15 | Jeremiah Burrowes | 0.97 | 1990-1998 | |
| 15 | António González | 0.97 | 1971-1984 | |
| 15 | Roberto Gonzáles | 0.97 | 2001-2008 | |
| 15 | Wallace Simmons | 0.97 | 1984-1991 | |
| 15 | Jesús Rocha | 0.97 | 2008-2014 | |
| 20 | Mark Gregg | 0.98 | 1998-2010 | |
| 20 | Lee Howard# | 0.98 | 2003-2015 | |
| 20 | Estaçio Cepa | 0.98 | 1997-2010 | |
| 20 | António Gallardo | 0.98 | 1996-2009 | |
| 20 | Carlos Nava | 0.98 | 1993-2005 | |
| 25 | Yorikane Ishii | 0.99 | 2002-2010 | |
| 25 | Randy De Jesús | 0.99 | 1993-2005 | |
| 25 | Jaime Rosado | 0.99 | 1993-2004 | |
| 25 | Donato Gil | 0.99 | 1993-2007 | |
| 25 | José Gonzáles | 0.99 | 2000-2009 | |
| 30 | Brent House | 1.00 | 2006-2015 | |
| 30 | Clarence Gallagher | 1.00 | 1981-1998 | |
| 30 | Bill Price | 1.00 | 2003-2015 | |
| 30 | Luis González | 1.00 | 1997-2008 | |
| 30 | Júlio Rocha | 1.00 | 2001-2015 | |
| 30 | Carlos Rodríguez | 1.00 | 1984-1996 | |
| 36 | Robby Lee | 1.01 | 1971-1979 | |
| 36 | Omar Romero | 1.01 | 1995-2001 | |
| 36 | Sean Ward | 1.01 | 1967-1975 | |
| 36 | Scott Antonio | 1.01 | 1996-2010 | |
| 36 | Vinnie Tyson# | 1.01 | 2001-2012 | |
| 36 | José Esparza# | 1.01 | 2006-2014 | |
| 36 | Roberto Talamante | 1.01 | 1987-1996 | |
| 36 | Julián Rodríguez | 1.01 | 1999-2011 | |
| 36 | Sherwood Gilbert | 1.01 | 1997-2006 | |
| 36 | Paco Flores | 1.01 | 1992-2003 | |
| 36 | Pablo Águila | 1.01 | 1992-2004 | |
| 36 | Lou Ames | 1.01 | 1993-2006 | |
| 36 | Keith Kimbell | 1.01 | 1957-1961 | |
| 36 | Pablo Lugo | 1.01 | 1991-2005 | |
| 50 | Randy Laidlaw | 1.02 | 1988-2000 | |
| 50 | Gavin Burns | 1.02 | 1991-1998 | |
| 50 | Howard Watson | 1.02 | 1992-2000 | |
| 50 | Ben Moore | 1.02 | 1974-1981 | |
| 50 | Bob Baker | 1.02 | 1992-1999 | |
| 50 | Andre Parks# | 1.02 | 2003-2011 | |
| 50 | Terry Abrego | 1.02 | 1983-1992 | |
| 57 | Ralph Frank | 1.03 | 1987-1995 | |
| 57 | Charlie Krumm | 1.03 | 1997-2009 | |
| 57 | Toby Nix | 1.03 | 1983-1992 | |
| 57 | Al Fletcher | 1.03 | 1984-1993 | |
| 57 | Will Madden# | 1.03 | 2006-2015 | |
| 57 | Edward Washington# | 1.03 | 2007-2015 | |
| 57 | Roberto Vázquez | 1.03 | 1989-2002 | |
| 57 | Roger Francis | 1.03 | 2004-2015 | |
| 57 | Alejandro Ávila# | 1.03 | 2006-2015 | |
| 57 | Fernando De Jesús | 1.03 | 1996-2007 | |
| 57 | Orlando Nevárez | 1.03 | 1989-1996 | |
| 57 | Edgardo Mendoza | 1.03 | 1992-2004 | |
| 57 | Ray Hawkins | 1.03 | 1991-2001 | |
| 70 | Howard Tate | 1.04 | 1991-1999 | |
| 70 | Neil Anderson | 1.04 | 1964-1975 | |
| 70 | Tony Salinas | 1.04 | 1997-2005 | |
| 70 | Bill Taylor | 1.04 | 1993-2001 | |
| 70 | Bennett Owens | 1.04 | 1975-1985 | |
| 70 | Cole Murphy | 1.04 | 1968-1980 | |
| 70 | Mike Roberts | 1.04 | 1998-2011 | |
| 70 | Juan Moreno | 1.04 | 1995-2002 | |
| 70 | Andy Carroll | 1.04 | 1980-1991 | |
| 70 | Herman Conway | 1.04 | 1957-1969 | |
| 70 | John Crow | 1.04 | 1983-1992 | |
| 70 | Robbie Stuart | 1.04 | 1987-1995 | |
| 82 | Juan Carlos López | 1.05 | 1991-1996 | |
| 82 | Bill Middleton | 1.05 | 1999-2008 | |
| 82 | Paul Hollins | 1.05 | 1987-1998 | |
| 82 | Júlio Velázquez | 1.05 | 1986-1993 | |
| 82 | Jim Gould | 1.05 | 1998-2006 | |
| 82 | Lee Faught | 1.05 | 1997-2005 | |
| 82 | Valentín Moreno | 1.05 | 1979-1988 | |
| 82 | Ronnie Gordon# | 1.05 | 2004-2014 | |
| 82 | Bobby Henderson | 1.05 | 1974-1980 | |
| 82 | Kenny Williams | 1.05 | 1980-1986 | |
| 82 | Matt Alemán | 1.05 | 2002-2015 | |
| 93 | Luis Bravo | 1.06 | 1999-2014 | |
| 93 | António Násquez | 1.06 | 1994-2006 | |
| 93 | Sergio Jaimes | 1.06 | 1996-2003 | |
| 93 | Augusto Ramírez | 1.06 | 1989-2003 | |
| 93 | Santiago Gómez | 1.06 | 1966-1979 | |
| 93 | Rex Brown | 1.06 | 1983-1990 | |
| 93 | Rodrigo Ávila | 1.06 | 2000-2008 | |
| 93 | Jeff Cook | 1.06 | 1989-2005 |
