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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Bill Mitchell | 1.13 | 1974-1980 | |
| 2 | Robert Vélez# | 1.23 | 1980-1988 | |
| 3 | Tommy Richardson | 1.27 | 1976-1981 | |
| 4 | Alfonso Gómez# | 1.36 | 1975-1981 | |
| 5 | Ronald Connolly# | 1.39 | 1979-1989 | |
| 6 | Jay Mills | 1.41 | 1921-1927 | |
| 7 | Quentin Tofts | 1.43 | 1937-1943 | |
| 8 | Luke Studs | 1.45 | 1943-1947 | |
| 8 | Flaherty Mure | 1.45 | 1960-1969 | |
| 10 | Elton Thompson# | 1.46 | 1977-1989 | |
| 11 | Gael Whiteway | 1.47 | 1973-1983 | |
| 12 | Naozane Kitakawa | 1.54 | 1934-1938 | |
| 12 | Serge Boutet | 1.54 | 1928-1933 | |
| 14 | Callum Simpson | 1.58 | 1972-1977 | |
| 15 | Jaime Gonzáles | 1.59 | 1933-1938 | |
| 16 | Aaron MacAlonie# | 1.60 | 1980-1986 | |
| 16 | Dylan Wheelton | 1.60 | 1943-1950 | |
| 18 | Robbie Kidwell | 1.61 | 1943-1950 | |
| 19 | Wally Todd | 1.64 | 1925-1928 | |
| 20 | Roldăo Canha | 1.65 | 1934-1937 | |
| 21 | Andrés López | 1.66 | 1927-1934 | |
| 22 | Lee Codd | 1.68 | 1972-1976 | |
| 23 | Pearce Ebbets | 1.72 | 1976-1986 | |
| 24 | Cody Albrecht | 1.73 | 1937-1940 | |
| 25 | Rich Morán# | 1.76 | 1979-1990 | |
| 25 | Samuel Bullman | 1.76 | 1926-1934 | |
| 27 | Haroun Akil# | 1.77 | 1981-1989 | |
| 28 | Slobodan Zoric# | 1.91 | 1975-1980 |
