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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Paul Oxley | 0.964 | 1972 | |
| 2 | Michael Powell | 0.965 | 1992 | |
| 3 | Clarence Milligan | 0.975 | 1981 | |
| 4 | Jack Proctor | 0.991 | 1973 | |
| 5 | Joseph Mathews# | 1.018 | 2010 | |
| 6 | Nick Bannatyne | 1.019 | 1995 | |
| 6 | Joe O'Halloran | 1.019 | 2000 | |
| 8 | Paul Oxley | 1.025 | 1971 | |
| 9 | Iván Ramos | 1.030 | 1997 | |
| 10 | Fernando Cortéz | 1.032 | 2002 | |
| 11 | Erik Boyd | 1.045 | 1997 | |
| 12 | George Banks* | 1.053 | 1985 | |
| 13 | José Rivera# | 1.054 | 2019 | |
| 14 | Jon Cook | 1.055 | 2003 | |
| 15 | Cristián Castillo | 1.057 | 1971 | |
| 16 | José Ochoa | 1.061 | 2004 | |
| 17 | Steve Hardin | 1.063 | 1983 | |
| 18 | Juan Villalobos | 1.066 | 2004 | |
| 18 | David Standard | 1.066 | 1993 | |
| 18 | Daniel Williams | 1.066 | 2011 | |
| 21 | Jermaine Matthews | 1.067 | 2010 | |
| 21 | Anthony Springer# | 1.067 | 2015 | |
| 23 | Richard Corbin | 1.069 | 1975 | |
| 24 | Mike Underwood | 1.078 | 1982 | |
| 25 | Richie Harrison | 1.080 | 1993 | |
| 26 | Brian Douglas | 1.084 | 1973 | |
| 27 | Ian Bryant | 1.085 | 2001 | |
| 28 | Tom Campbell* | 1.086 | 1977 | |
| 29 | Bret Martin | 1.089 | 1992 | |
| 29 | David Edwards | 1.089 | 2010 | |
| 31 | Thomas Graham | 1.091 | 1986 | |
| 32 | Benedict Johnson | 1.092 | 1971 | |
| 33 | Don Ranby | 1.094 | 1978 | |
| 34 | Reggie Dunbar | 1.096 | 1975 | |
| 35 | Alfonso Salgado | 1.097 | 2011 | |
| 35 | Ed Pride | 1.097 | 1997 | |
| 37 | Orlando Pérez | 1.098 | 1980 | |
| 38 | Darby Knox | 1.099 | 1972 | |
| 38 | Mario Palmeiro | 1.099 | 1994 | |
| 38 | Michael Byrne | 1.099 | 1972 | |
| 38 | Seth Williams | 1.099 | 1992 | |
| 38 | Howard Terrill | 1.099 | 1982 | |
| 43 | Víctor Ramos# | 1.100 | 2016 | |
| 43 | Kotu Okeyo | 1.100 | 2003 | |
| 45 | Cris Abreu | 1.101 | 1984 | |
| 46 | Rodolfo Romero | 1.102 | 1977 | |
| 47 | Alejandro González | 1.105 | 2002 | |
| 48 | Zach Henry | 1.106 | 2010 | |
| 49 | Luis López | 1.110 | 2017 | |
| 50 | Elmer Davis | 1.111 | 1982 | |
| 50 | José Fuentes | 1.111 | 2005 | |
| 52 | Miguel Tamayo | 1.113 | 1992 | |
| 53 | Brent Morris | 1.115 | 1973 | |
| 54 | Russell Craig | 1.116 | 1973 | |
| 55 | Paul Melton | 1.117 | 1985 | |
| 56 | Tyrone Foster | 1.119 | 1975 | |
| 56 | Luis Villarreal | 1.119 | 1998 | |
| 56 | Lorenzo Contreras# | 1.119 | 2022 | |
| 59 | Edward White | 1.121 | 1978 | |
| 60 | Esteban Alfonso | 1.122 | 1980 | |
| 61 | Tex Jones# | 1.123 | 2019 | |
| 61 | Matt Smith | 1.123 | 1981 | |
| 63 | Félix Cruz | 1.124 | 1982 | |
| 63 | Steve Reed | 1.124 | 1993 | |
| 65 | Earl Roach | 1.127 | 2001 | |
| 66 | Robby Brown# | 1.128 | 2021 | |
| 66 | Dustin Horton | 1.128 | 2009 | |
| 68 | Sancho Padilla | 1.129 | 1974 | |
| 68 | Dave Hall | 1.129 | 1979 | |
| 70 | Pete Jones | 1.130 | 1982 | |
| 71 | Randy Boyd | 1.134 | 1978 | |
| 72 | Kang Zha | 1.137 | 2014 | |
| 72 | Artie Sullivan | 1.137 | 1993 | |
| 74 | Todd Lee | 1.138 | 2019 | |
| 74 | José Fuentes | 1.138 | 2003 | |
| 76 | Kelly Moser | 1.140 | 1975 | |
| 77 | Billy Lee | 1.141 | 1979 | |
| 78 | José Durán | 1.143 | 1991 | |
| 78 | Jon House | 1.143 | 1981 | |
| 78 | Juan Yánez | 1.143 | 2007 | |
| 81 | Juan Gonzáles | 1.144 | 2009 | |
| 82 | Mathew Conley | 1.145 | 2016 | |
| 83 | Andrew Adams | 1.146 | 1989 | |
| 84 | Sergio Torres | 1.147 | 1980 | |
| 85 | Alex Hopkins# | 1.148 | 2016 | |
| 86 | Rafi Pellicer | 1.149 | 1990 | |
| 86 | Juan Gonzáles | 1.149 | 2010 | |
| 86 | Harvey Covington | 1.149 | 1977 | |
| 89 | Tony Thomas | 1.150 | 1973 | |
| 89 | Phil Fletcher | 1.150 | 1978 | |
| 89 | John Miller# | 1.150 | 2021 | |
| 92 | Roy Camp | 1.152 | 1993 | |
| 92 | Domingo Vitier | 1.152 | 1971 | |
| 94 | Micheal Leach# | 1.153 | 2019 | |
| 94 | Dale Jones | 1.153 | 2001 | |
| 94 | Román Mota | 1.153 | 1989 | |
| 97 | Ángel Amaya# | 1.154 | 2015 | |
| 97 | César López | 1.154 | 1979 | |
| 97 | Dave Marks | 1.154 | 2009 | |
| 100 | Chris Edwards | 1.155 | 1982 |
