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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Nick Childers | 0.811 | 2010 | |
| 2 | Joe Baxter | 0.854 | 1979 | |
| 3 | Chuck Murray | 0.928 | 2005 | |
| 4 | Steve Johnson | 0.934 | 1992 | |
| 5 | Anthony Tolbert | 0.950 | 1986 | |
| 6 | Carlos Romero | 0.964 | 1992 | |
| 7 | Ángel Hernández | 0.985 | 1999 | |
| 8 | Miguel Tamayo | 1.002 | 1983 | |
| 9 | Sergio Canó | 1.003 | 2003 | |
| 10 | Dale Bader | 1.018 | 1974 | |
| 11 | Jamie Carson | 1.024 | 1973 | |
| 12 | Bob Cannon | 1.030 | 2006 | |
| 13 | Adam Harper | 1.033 | 1975 | |
| 13 | Felipe Salazar | 1.033 | 1983 | |
| 15 | José Aponte | 1.035 | 1976 | |
| 15 | José Guzmán | 1.035 | 1977 | |
| 17 | Jim Wyatt | 1.039 | 1972 | |
| 18 | Jesús Rivera# | 1.046 | 2012 | |
| 19 | Cory Lewis | 1.052 | 1973 | |
| 20 | Karl Beatty | 1.053 | 2000 | |
| 21 | Pat Burns | 1.055 | 1972 | |
| 21 | Steve Flynn | 1.055 | 1978 | |
| 23 | Harry Thomas | 1.058 | 1992 | |
| 23 | Dan Nance | 1.058 | 1985 | |
| 25 | Roberto Maldonado | 1.061 | 1993 | |
| 25 | Guillermo Rivera | 1.061 | 1978 | |
| 27 | Adrian Franklin | 1.063 | 1992 | |
| 28 | Darrell Blackwell# | 1.067 | 2017 | |
| 29 | Jeff Carlton | 1.074 | 1978 | |
| 30 | Ramón Domínguez | 1.075 | 1982 | |
| 31 | Roy Ballard | 1.077 | 1986 | |
| 32 | Billy Lee | 1.080 | 1977 | |
| 33 | Brian Randall | 1.084 | 1973 | |
| 34 | Zak Brown | 1.086 | 1992 | |
| 35 | Johnny Herbert | 1.089 | 1992 | |
| 36 | Jorge Barrón | 1.090 | 1982 | |
| 36 | Carlos Lara | 1.090 | 1975 | |
| 38 | Greg Sullivan# | 1.093 | 2011 | |
| 39 | John Sheppard | 1.094 | 1972 | |
| 40 | Paul Cochran | 1.097 | 1980 | |
| 41 | Steve Reed | 1.101 | 1992 | |
| 42 | Rodney Browne | 1.103 | 1976 | |
| 42 | Dave Hinton# | 1.103 | 2018 | |
| 44 | Roberto Villanueva | 1.105 | 1980 | |
| 44 | Daniel Williams | 1.105 | 1978 | |
| 46 | José Aguilar# | 1.108 | 2018 | |
| 47 | Emílio Vázquez | 1.109 | 1992 | |
| 48 | Dave Curry | 1.111 | 1979 | |
| 49 | Doug Downs | 1.115 | 1983 | |
| 50 | Robert Hathaway | 1.117 | 1976 | |
| 51 | Woodrow Sepúlveda | 1.119 | 1989 | |
| 52 | Wes Reid | 1.120 | 1981 | |
| 53 | Fraser Anderson | 1.121 | 1992 | |
| 54 | Ramón Domínguez | 1.122 | 1981 | |
| 55 | Rusty Wise | 1.123 | 1981 | |
| 56 | Roger Martin | 1.126 | 1976 | |
| 56 | Charlie Parker | 1.126 | 2004 | |
| 56 | Matt Pearson | 1.126 | 1976 | |
| 56 | Calvin Valentine | 1.126 | 1992 | |
| 60 | Randall Reynolds | 1.129 | 2014 | |
| 60 | Bill Smith | 1.129 | 2011 | |
| 62 | Orlando Rodríguez | 1.131 | 1976 | |
| 63 | José Muñóz | 1.134 | 1979 | |
| 64 | Hunter Knox | 1.137 | 1977 | |
| 64 | Jim Baker | 1.137 | 1975 | |
| 66 | Edward Olson | 1.138 | 1993 | |
| 66 | Earl Reece | 1.138 | 2008 | |
| 68 | Jerry Dickerson | 1.139 | 2009 | |
| 69 | António Aranda | 1.140 | 1987 | |
| 70 | Tadaaki Takahashi | 1.142 | 1992 | |
| 71 | Jamie Arnold | 1.147 | 1972 | |
| 71 | Michael Mitchelmore | 1.147 | 1999 | |
| 73 | Bob Wilson | 1.148 | 1974 | |
| 74 | Alejandro Trujillo | 1.149 | 2000 | |
| 75 | Jeffery Nelson | 1.150 | 2012 | |
| 76 | Pierre-Alexandre Therrien | 1.152 | 2010 | |
| 76 | Francisco Muñóz | 1.152 | 1984 | |
| 78 | Enrique Núñez | 1.155 | 1982 | |
| 78 | Jacinto Vázquez | 1.155 | 2000 | |
| 80 | Shane Herring | 1.156 | 1985 | |
| 80 | Dave Miller | 1.156 | 1980 | |
| 80 | Jim Baker | 1.156 | 1974 | |
| 83 | Barney Coffey# | 1.158 | 2016 | |
| 84 | Ed Schneider | 1.161 | 1985 | |
| 85 | Júlio Echevarría | 1.162 | 1982 | |
| 86 | Tim Williams | 1.163 | 1989 | |
| 87 | Daniel Williams | 1.164 | 1975 | |
| 88 | Norm Porter | 1.166 | 1976 | |
| 89 | José López | 1.168 | 1973 | |
| 90 | Frank Reed | 1.169 | 1985 | |
| 91 | Phil Coffield | 1.172 | 1982 | |
| 91 | Kenneth Lewis | 1.172 | 2006 | |
| 91 | Aurelio Díaz | 1.172 | 1985 | |
| 94 | António García | 1.174 | 1995 | |
| 95 | Neil Hopkins | 1.176 | 2002 | |
| 96 | Alvin Álvarez | 1.178 | 2015 | |
| 96 | Wes Reid | 1.178 | 1982 | |
| 98 | Denis Taylor | 1.180 | 2009 | |
| 99 | Jack Anderson | 1.182 | 1984 | |
| 99 | Melvin Jackson | 1.182 | 1989 |
