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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Austin Mitchell | 0.869 | 1979 | |
| 2 | Gerald Chambers | 0.954 | 2001 | |
| 3 | Derrek Thompson | 0.969 | 1981 | |
| 4 | Jeffrey Lewis | 0.976 | 1999 | |
| 5 | Vincente Álvarez | 0.980 | 2000 | |
| 6 | Bob Smith | 0.990 | 1971 | |
| 7 | Shawn Price | 0.997 | 1973 | |
| 8 | Juan Rosado | 1.004 | 1981 | |
| 9 | Kyle O'Mackesey | 1.007 | 2006 | |
| 10 | Chris Todd | 1.008 | 1986 | |
| 11 | Nicholas Sawyer | 1.017 | 1971 | |
| 12 | Harry Bennett# | 1.024 | 2019 | |
| 13 | Ronald McClure | 1.026 | 2016 | |
| 14 | Alejandro Flores | 1.029 | 1972 | |
| 15 | David Hendricks | 1.033 | 1986 | |
| 16 | Ian Scott | 1.037 | 2002 | |
| 17 | Mario Murillo# | 1.038 | 2020 | |
| 18 | Ken Douglas | 1.040 | 1979 | |
| 18 | Aaron Spivey | 1.040 | 1973 | |
| 20 | Kevin Ross | 1.044 | 2013 | |
| 21 | Trevor Bolden# | 1.049 | 2010 | |
| 22 | Daniel MacPherson | 1.051 | 1993 | |
| 23 | Tom MacDowell | 1.060 | 1970 | |
| 24 | Orlando Díaz | 1.064 | 1986 | |
| 25 | Alonso Castillo | 1.067 | 1994 | |
| 26 | Clarence Gordon | 1.069 | 2010 | |
| 27 | Shigeru Murata | 1.076 | 1989 | |
| 27 | Randy Robinson# | 1.076 | 2016 | |
| 29 | John Haynes | 1.078 | 1976 | |
| 29 | Todd Lee | 1.078 | 2018 | |
| 31 | Mark Long | 1.079 | 1977 | |
| 32 | Félix Pezina | 1.081 | 2002 | |
| 33 | Jorge González | 1.083 | 1998 | |
| 34 | Ken Daly | 1.085 | 2001 | |
| 35 | Joe Hicks | 1.088 | 1990 | |
| 35 | Clarence Burch | 1.088 | 1998 | |
| 37 | Ethan Mahoney | 1.090 | 2002 | |
| 38 | Dale Bader | 1.092 | 1978 | |
| 39 | Deron Martin | 1.094 | 1976 | |
| 40 | Jim Martin | 1.096 | 1994 | |
| 41 | Glenn Kramer | 1.098 | 1997 | |
| 41 | Richard O'Halloran | 1.098 | 1980 | |
| 43 | Sergio Torres | 1.099 | 1979 | |
| 44 | Cory Lewis | 1.101 | 1975 | |
| 44 | Bill Wright | 1.101 | 1992 | |
| 44 | Nacho Guzmán# | 1.101 | 2013 | |
| 47 | Robert Davis | 1.102 | 1980 | |
| 47 | Jesús Flores | 1.102 | 1992 | |
| 49 | Aaron McGill | 1.103 | 1981 | |
| 49 | António De La Cruz | 1.103 | 2006 | |
| 51 | José Pacheco | 1.104 | 1985 | |
| 52 | Wilson Guerrero | 1.106 | 1976 | |
| 53 | Kevin Wheeler | 1.107 | 1979 | |
| 54 | Don Graham | 1.108 | 1976 | |
| 54 | Dan McCormick | 1.108 | 1973 | |
| 56 | Earl Moss | 1.110 | 1980 | |
| 57 | Erik White | 1.113 | 2014 | |
| 58 | José Ayllón | 1.114 | 1988 | |
| 59 | Martin Méthot | 1.115 | 1975 | |
| 60 | Kent Yockey | 1.116 | 1986 | |
| 60 | Jack Moreno | 1.116 | 1977 | |
| 62 | Serafino Spoletiani | 1.118 | 2014 | |
| 62 | Peyton Meyer | 1.118 | 2015 | |
| 64 | Eric Fuller | 1.119 | 1993 | |
| 64 | Fernando Rodríguez | 1.119 | 2009 | |
| 66 | César Colomo | 1.122 | 1990 | |
| 67 | Armando López | 1.123 | 1972 | |
| 68 | Phil Harrison | 1.126 | 1992 | |
| 68 | Jessie Brown | 1.126 | 1974 | |
| 68 | Manuel Salinas# | 1.126 | 2017 | |
| 71 | José Souza | 1.128 | 2009 | |
| 72 | Albert Waller | 1.130 | 2019 | |
| 73 | Toby García# | 1.132 | 2022 | |
| 74 | Tim Horne | 1.133 | 2010 | |
| 75 | Steve Gourin | 1.134 | 2003 | |
| 76 | Carlos García | 1.137 | 1992 | |
| 77 | Dave Hartman | 1.139 | 2002 | |
| 77 | Rodrigo Sánchez# | 1.139 | 2019 | |
| 77 | Daniel Valdéz | 1.139 | 2005 | |
| 77 | José Jiménez | 1.139 | 2005 | |
| 81 | Júlio Cruz | 1.141 | 1979 | |
| 82 | Jacob Priestley | 1.142 | 1985 | |
| 82 | Jeff Tapping | 1.142 | 2015 | |
| 84 | Shi-fa Thian | 1.146 | 1997 | |
| 85 | José Huerta | 1.147 | 1989 | |
| 86 | Chris Martin | 1.148 | 1992 | |
| 87 | Brendan Farris | 1.150 | 1970 | |
| 88 | Wayne Bass | 1.151 | 1976 | |
| 89 | Gary Fox | 1.152 | 2011 | |
| 89 | Orlando Rodríguez | 1.152 | 1977 | |
| 89 | Dave Hall | 1.152 | 1978 | |
| 92 | Jason Brown | 1.153 | 1970 | |
| 92 | Ángel López | 1.153 | 2016 | |
| 94 | Justin Coker | 1.155 | 1988 | |
| 94 | Travis Fuller | 1.155 | 1992 | |
| 96 | Mun-yeong Sin | 1.157 | 2000 | |
| 97 | Héctor Mejía | 1.158 | 1971 | |
| 98 | Abu Jabiri | 1.159 | 1972 | |
| 99 | Manny Martínez | 1.160 | 1990 | |
| 99 | Jesús Robles | 1.160 | 2003 |
