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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Bob Burton* | 0.90 | 1963-1974 | |
| 2 | Alfredo Germán# | 1.08 | 1976-1989 | |
| 3 | Bill López | 1.09 | 1959-1969 | |
| 4 | Orlando Trujillo | 1.11 | 1971-1981 | |
| 5 | Ricardo Morín | 1.13 | 1976-1986 | |
| 5 | Sergio Díaz | 1.13 | 1979-1985 | |
| 7 | Jorge Chávez | 1.14 | 1978-1989 | |
| 7 | Mende Aljeroz# | 1.14 | 1981-1987 | |
| 9 | Alexandre Coulon | 1.15 | 1959-1967 | |
| 9 | Daniel Adebamgbe | 1.15 | 1974-1988 | |
| 9 | Miguel Angel Gutiérrez | 1.15 | 1976-1986 | |
| 12 | Kennan Ready | 1.16 | 1963-1967 | |
| 13 | Fatin Nadhir | 1.17 | 1980-1987 | |
| 14 | Resit Edip# | 1.18 | 1985-1989 | |
| 14 | Gordon Zorn | 1.18 | 1961-1972 | |
| 16 | Dan Brooks* | 1.19 | 1935-1949 | |
| 16 | David Widhoezl# | 1.19 | 1982-1989 | |
| 16 | Adalgiso Gohmann | 1.19 | 1966-1974 | |
| 19 | Bart Halsall | 1.20 | 1963-1977 | |
| 19 | Clive Mackley | 1.20 | 1956-1968 | |
| 19 | Davy Simmons | 1.20 | 1967-1974 | |
| 19 | Juan Méndez | 1.20 | 1959-1968 | |
| 23 | Pablo Peña | 1.21 | 1963-1976 | |
| 23 | Candramrta Shruti# | 1.21 | 1985-1990 | |
| 23 | Armando Velázquez | 1.21 | 1961-1973 | |
| 26 | Daryl Channing | 1.22 | 1981-1990 | |
| 26 | Nadir Asad# | 1.22 | 1982-1989 | |
| 26 | Stewart Carter | 1.22 | 1965-1974 | |
| 26 | Takakazu Ohayashi | 1.22 | 1974-1978 | |
| 26 | Rahimat bin Fareed | 1.22 | 1981-1987 | |
| 31 | Sean Burke | 1.23 | 1950-1962 | |
| 31 | Damian Hull | 1.23 | 1963-1968 | |
| 31 | León Altagracia | 1.23 | 1962-1969 | |
| 34 | Richard Dawson | 1.24 | 1952-1969 | |
| 34 | Alejandro Portillo | 1.24 | 1955-1962 | |
| 34 | Roy Evison | 1.24 | 1979-1985 | |
| 34 | Rubén Martínez | 1.24 | 1969-1980 | |
| 34 | Luis Manuel Vélez | 1.24 | 1954-1974 | |
| 34 | Ernesto Colomo | 1.24 | 1973-1978 | |
| 34 | Vincent Gaubert | 1.24 | 1959-1969 | |
| 34 | Pedro García | 1.24 | 1967-1973 | |
| 42 | Onel Esperenzilla | 1.25 | 1956-1969 | |
| 42 | Matt Rogalski | 1.25 | 1953-1971 | |
| 42 | Waldemar Abbeel | 1.25 | 1983-1990 | |
| 42 | Samuel Jackson | 1.25 | 1960-1965 | |
| 46 | Jorge Domínguez | 1.26 | 1979-1985 | |
| 46 | Luis Torres | 1.26 | 1968-1979 | |
| 46 | Jesús Archuleta | 1.26 | 1977-1984 | |
| 46 | Jason Wyatt | 1.26 | 1975-1982 | |
| 46 | Mauro Chapa | 1.26 | 1954-1969 | |
| 46 | Mitsunari Sato | 1.26 | 1969-1980 | |
| 46 | Okan Basar | 1.26 | 1975-1981 | |
| 53 | Alonso García | 1.27 | 1961-1977 | |
| 53 | Virgile Valli# | 1.27 | 1979-1990 | |
| 53 | Trey Manning# | 1.27 | 1984-1989 | |
| 53 | Bishr Diya al Din | 1.27 | 1973-1977 | |
| 53 | Grigory Agafonoff | 1.27 | 1979-1987 | |
| 53 | Rhys Green# | 1.27 | 1984-1990 | |
| 59 | Billy Atkinson | 1.28 | 1982-1989 | |
| 59 | Jasper Willis | 1.28 | 1959-1966 | |
| 59 | George Kinch | 1.28 | 1979-1984 | |
| 59 | Joshua Buller | 1.28 | 1958-1969 | |
| 59 | Martín Villa | 1.28 | 1976-1986 | |
| 59 | Anastasio Álvarez# | 1.28 | 1981-1987 | |
| 59 | Aleixo Freixieiro | 1.28 | 1974-1985 | |
| 59 | Liann-wei Lok | 1.28 | 1961-1969 | |
| 59 | Aniq bin Baha al Din | 1.28 | 1975-1987 | |
| 68 | Jesús Vázquez | 1.29 | 1953-1965 | |
| 68 | Oscar Prudom | 1.29 | 1960-1973 | |
| 68 | Roscoe Morin | 1.29 | 1964-1973 | |
| 68 | Bob Fish | 1.29 | 1977-1988 | |
| 72 | Lorenzo Espinoza | 1.30 | 1972-1980 | |
| 72 | Matthaus Rueckl | 1.30 | 1982-1987 | |
| 72 | Ewan Handford | 1.30 | 1973-1977 | |
| 72 | Rafael Serrano | 1.30 | 1980-1987 | |
| 72 | Charles Autry | 1.30 | 1968-1977 | |
| 72 | George Triska | 1.30 | 1949-1960 | |
| 72 | Joe Olson | 1.30 | 1965-1978 | |
| 72 | Andrés Morán | 1.30 | 1954-1968 | |
| 80 | Tad Demer | 1.31 | 1977-1990 | |
| 80 | Dan Lane# | 1.31 | 1984-1990 | |
| 80 | Quan Li | 1.31 | 1973-1981 | |
| 83 | Barry Roy | 1.32 | 1929-1948 | |
| 83 | Noah Widdrington | 1.32 | 1967-1979 | |
| 83 | Manuel Torres | 1.32 | 1940-1951 | |
| 83 | Bill Knapp | 1.32 | 1981-1987 | |
| 83 | Chris Morris | 1.32 | 1977-1984 | |
| 83 | Numair Abdul-Mujib | 1.32 | 1982-1987 | |
| 83 | Mitchell Driscoll | 1.32 | 1966-1980 | |
| 83 | Niek Scheele | 1.32 | 1967-1979 | |
| 83 | Jun Yoshikawa | 1.32 | 1943-1958 | |
| 92 | Ignazio Barbiusa | 1.33 | 1960-1965 | |
| 92 | Louis Duxbury | 1.33 | 1947-1958 | |
| 92 | César González | 1.33 | 1950-1963 | |
| 92 | John Burford | 1.33 | 1961-1967 | |
| 92 | Sebastian Tyley | 1.33 | 1967-1980 | |
| 97 | Vicente Torres | 1.34 | 1929-1940 | |
| 97 | Jorge Delgado | 1.34 | 1974-1987 | |
| 97 | Robert Nance | 1.34 | 1952-1965 | |
| 97 | Donald Maxwell | 1.34 | 1978-1987 |
