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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ramão Lumbrales | 1.14 | 1922-1929 | |
| 2 | Norris Kifer | 1.17 | 1924-1929 | |
| 3 | Lorenzo Torres | 1.18 | 1927-1931 | |
| 4 | José Marino | 1.19 | 1918-1924 | |
| 5 | Cary Hubbard | 1.24 | 1917-1926 | |
| 6 | Chris Bastien | 1.25 | 1937-1942 | |
| 7 | James Brown | 1.26 | 1928-1934 | |
| 8 | David Little | 1.27 | 1915-1919 | |
| 8 | Daniel Torres | 1.27 | 1931-1942 | |
| 10 | Vic Vandermeer | 1.29 | 1924-1934 | |
| 10 | Tadamasa Kimura | 1.29 | 1934-1944 | |
| 10 | Doug Lawrence | 1.29 | 1921-1925 | |
| 13 | Ted Cunningham | 1.30 | 1926-1933 | |
| 14 | Billy Heiser | 1.31 | 1921-1930 | |
| 14 | António Morales | 1.31 | 1916-1928 | |
| 16 | Hugo Olivier | 1.32 | 1934-1942 | |
| 17 | Tin-jong Siu | 1.33 | 1940-1946 | |
| 17 | Chris Bedford | 1.33 | 1911-1917 | |
| 19 | Akira Abe | 1.34 | 1911-1919 | |
| 20 | Stephen Reeves | 1.35 | 1924-1935 | |
| 21 | Kevin Holmes# | 1.36 | 1977-1990 | |
| 21 | Donald Gilbert | 1.36 | 1911-1921 | |
| 23 | Louis Dillon | 1.37 | 1960-1972 | |
| 23 | Allen Ash | 1.37 | 1925-1932 | |
| 25 | Mortimer Cold | 1.38 | 1924-1935 | |
| 25 | Jimmy Smith | 1.38 | 1911-1920 | |
| 25 | Mitch Payne | 1.38 | 1911-1921 | |
| 28 | Cliff Blake | 1.39 | 1911-1917 | |
| 28 | Brian Strong | 1.39 | 1922-1930 | |
| 30 | Ryan Duncan | 1.40 | 1946-1960 | |
| 30 | Jason González | 1.40 | 1978-1988 | |
| 30 | Matt Meadows | 1.40 | 1935-1945 | |
| 33 | Kevin Pollock# | 1.41 | 1977-1990 | |
| 33 | Josh Jenkins | 1.41 | 1921-1927 | |
| 33 | Gabriel Ramírez | 1.41 | 1921-1929 | |
| 33 | Ramón Pérez | 1.41 | 1929-1935 | |
| 33 | José Ojeda | 1.41 | 1912-1921 | |
| 33 | Diego Ramírez | 1.41 | 1961-1975 | |
| 39 | Lodovico Guglielmotti | 1.42 | 1975-1981 | |
| 39 | Kevin Barnett | 1.42 | 1937-1947 | |
| 39 | Curt Fullerton | 1.42 | 1963-1980 | |
| 39 | John Drake | 1.42 | 1924-1939 | |
| 39 | Ron Stroud | 1.42 | 1928-1939 | |
| 44 | Tomás Sánchez | 1.43 | 1936-1948 | |
| 44 | Edwin van Pelt | 1.43 | 1927-1938 | |
| 44 | Carlos Cruz | 1.43 | 1957-1966 | |
| 47 | Riemer Steenis | 1.44 | 1943-1949 | |
| 48 | Wilbur Patterson | 1.45 | 1949-1960 | |
| 48 | Bart Nicholas | 1.45 | 1920-1924 | |
| 48 | Robert Reese | 1.45 | 1917-1922 | |
| 48 | Joep de Vlaming | 1.45 | 1941-1947 | |
| 48 | Emílio García | 1.45 | 1945-1957 | |
| 48 | José Murillo | 1.45 | 1911-1915 | |
| 48 | Alex McKenzie | 1.45 | 1959-1969 | |
| 48 | Mauro Alfaro | 1.45 | 1926-1938 | |
| 48 | Everett Moore | 1.45 | 1977-1987 | |
| 57 | Fred Haynes | 1.48 | 1911-1914 | |
| 57 | Germán López | 1.48 | 1940-1947 | |
| 57 | Rob Davis# | 1.48 | 1983-1991 | |
| 57 | Pedro Valenzuela | 1.48 | 1931-1941 | |
| 57 | Steven Bingham | 1.48 | 1922-1926 | |
| 62 | Tim Benton | 1.49 | 1975-1987 | |
| 63 | Denzel Brown | 1.50 | 1915-1922 | |
| 63 | Martín Herrera | 1.50 | 1969-1975 | |
| 63 | David Bennett | 1.50 | 1931-1936 | |
| 63 | Renault Recchi | 1.50 | 1936-1947 | |
| 63 | Miguel Torres | 1.50 | 1940-1944 | |
| 63 | Jeff Rainey# | 1.50 | 1982-1989 | |
| 69 | Felipe Hernández | 1.51 | 1919-1926 | |
| 69 | Glenn Mills | 1.51 | 1912-1917 | |
| 69 | António García | 1.51 | 1961-1967 | |
| 72 | Alonso González | 1.53 | 1921-1924 | |
| 72 | Lucas Bergström | 1.53 | 1941-1950 | |
| 74 | Joe Johns | 1.54 | 1914-1921 | |
| 74 | Trey Manning# | 1.54 | 1979-1983 | |
| 74 | José Santiago | 1.54 | 1938-1950 | |
| 77 | Artie Wilkins# | 1.57 | 1983-1991 | |
| 78 | Sergio Rivera | 1.58 | 1911-1916 | |
| 79 | Jaime Montáñez | 1.59 | 1945-1953 | |
| 79 | Marvin Wilson | 1.59 | 1952-1957 | |
| 79 | Griff Faulkner | 1.59 | 1946-1952 | |
| 82 | Aurélien Bob | 1.62 | 1945-1947 | |
| 83 | Ronaldo Delgado# | 1.63 | 1983-1991 | |
| 83 | Ron Farmer | 1.63 | 1954-1962 | |
| 83 | Jonathon Sampson | 1.63 | 1947-1954 | |
| 83 | Russ Bazin | 1.63 | 1935-1941 | |
| 87 | Joe Clément | 1.64 | 1958-1970 | |
| 87 | Robert Ellison | 1.64 | 1956-1965 | |
| 87 | Joe Cannon | 1.64 | 1977-1987 | |
| 90 | Alonso Martínez | 1.66 | 1976-1987 | |
| 91 | Peter Franklin | 1.72 | 1976-1987 | |
| 92 | John Aastrom | 1.74 | 1935-1946 | |
| 93 | Sylvester Brooks | 1.77 | 1938-1947 | |
| 94 | Mike Keil# | 1.84 | 1978-1989 | |
| 95 | Kiyomitsu Sano | 1.90 | 1975-1982 | |
| 96 | Borek Jerksak | 1.93 | 1944-1955 |
