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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Ed Wood | 0.265 | 1932-1947 | |
| 2 | Charlie Sis* | 0.766 | 1903-1921 | |
| 3 | Bill McDaniel | 1.276 | 1901-1913 | |
| 4 | Charlie Firestone* | 1.286 | 1912-1919 | |
| 5 | Dan Tyler | 1.562 | 1909-1918 | |
| 6 | Hal Hackney | 1.800 | 1945-1959 | |
| 6 | Bob Young | 1.800 | 1908-1920 | |
| 8 | Butch Smith | 1.884 | 1938-1950 | |
| 9 | Don Noftall | 1.913 | 1892-1903 | |
| 10 | Jim Golden* | 1.973 | 1909-1920 | |
| 11 | Gil Purdy | 2.057 | 1901-1916 | |
| 12 | Bill Ross | 2.090 | 1920-1936 | |
| 13 | George Johnson* | 2.093 | 1907-1926 | |
| 14 | John Stallings | 2.143 | 1946-1965 | |
| 15 | Woody Trease* | 2.217 | 1901-1912 | |
| 16 | Mose Smith | 2.302 | 1915-1929 | |
| 17 | Joe Myres | 2.308 | 1916-1927 | |
| 18 | Ike Bell | 2.361 | 1899-1906 | |
| 19 | Al Miller* | 2.365 | 1935-1959 | |
| 20 | Mike Robinson | 2.368 | 1908-1911 | |
| 21 | Jim Lonardo* | 2.485 | 1928-1947 | |
| 22 | Charlie Wilson* | 2.559 | 1889-1901 | |
| 23 | Chris Clarke | 2.585 | 1937-1949 | |
| 23 | Joe Hancock* | 2.585 | 1936-1957 | |
| 25 | Steve Madden# | 2.605 | 1960-1974 | |
| 26 | Bob Harris | 2.641 | 1910-1917 | |
| 27 | Bill Temple* | 2.652 | 1899-1911 | |
| 28 | Adrian Czerwinski* | 2.668 | 1948-1965 | |
| 29 | Allan Allen* | 2.700 | 1890-1909 | |
| 30 | Hal Bennett# | 2.755 | 1969-1974 | |
| 31 | Jorge Arellano# | 2.782 | 1954-1974 | |
| 32 | Bob Hollister# | 2.784 | 1957-1974 | |
| 33 | Marco Middleton# | 2.852 | 1962-1974 | |
| 34 | Isaac Meyer | 2.872 | 1908-1919 | |
| 35 | Bill West* | 3.072 | 1904-1917 | |
| 36 | Pete Boyer | 3.094 | 1915-1926 | |
| 37 | Jack Halbur | 3.147 | 1952-1964 | |
| 38 | Rabbit Day* | 3.200 | 1927-1944 | |
| 39 | Billy Riley | 3.240 | 1938-1953 | |
| 40 | Red Ross | 3.250 | 1936-1948 | |
| 41 | Mike Marner* | 3.298 | 1907-1918 | |
| 42 | Luke Smith | 3.306 | 1916-1929 | |
| 43 | Tommy Jackson# | 3.343 | 1971-1974 | |
| 44 | John Blackburn | 3.441 | 1904-1909 | |
| 45 | Bob Johnston | 3.456 | 1905-1919 | |
| 46 | Harry Horn | 3.468 | 1921-1934 | |
| 47 | George Davis | 3.489 | 1916-1928 | |
| 48 | Fred Washington | 3.600 | 1950-1964 | |
| 49 | Walt Wells | 3.649 | 1935-1949 | |
| 50 | John Bigness | 3.703 | 1897-1912 | |
| 51 | Clem Rothstein | 3.706 | 1908-1918 | |
| 52 | Vern Hubbard | 3.772 | 1937-1953 | |
| 53 | Ed Bowman* | 3.799 | 1942-1961 | |
| 54 | Tom Barrell* | 3.857 | 1932-1945 | |
| 55 | Fred Henry | 3.884 | 1895-1907 | |
| 56 | Rufus Barrell II* | 3.890 | 1938-1962 | |
| 57 | Hank Berkowitz | 3.979 | 1950-1970 | |
| 58 | George Dunnigan# | 3.995 | 1963-1974 | |
| 59 | John Jones | 4.010 | 1909-1917 | |
| 60 | Morris Harris | 4.014 | 1892-1906 | |
| 61 | Floyd Warner# | 4.061 | 1957-1974 | |
| 62 | Eli Panneton | 4.065 | 1944-1957 | |
| 63 | John Jackson | 4.091 | 1948-1969 | |
| 64 | Jack Miller | 4.097 | 1949-1964 | |
| 65 | Danny Hern | 4.098 | 1940-1956 | |
| 66 | Augie Hicks# | 4.114 | 1965-1974 | |
| 67 | Russ Reel | 4.154 | 1929-1936 | |
| 68 | Billy Hasson# | 4.194 | 1957-1974 | |
| 69 | Dick Richards | 4.200 | 1923-1935 | |
| 70 | Jack Kotarski# | 4.238 | 1965-1974 | |
| 71 | John Roberts# | 4.418 | 1965-1974 | |
| 72 | Bill Dunlop# | 4.472 | 1965-1974 | |
| 73 | Sammy Butler | 4.500 | 1916-1929 | |
| 74 | Dean Astle | 4.545 | 1933-1946 | |
| 75 | Hiram Steinberg | 4.711 | 1945-1957 | |
| 76 | Alvin Hensley | 4.909 | 1899-1909 | |
| 76 | Frenchy Mack* | 4.909 | 1956-1969 | |
| 78 | Jim Norris# | 4.981 | 1952-1974 | |
| 79 | Ducky Davis | 5.023 | 1944-1959 | |
| 80 | Alexander Elliott | 5.366 | 1886-1906 | |
| 81 | Lefty Allen* | 5.494 | 1935-1953 | |
| 82 | Paul Anderson | 6.246 | 1951-1965 | |
| 83 | Charlie Stedman | 6.337 | 1926-1942 | |
| 84 | Vern Osborne# | 9.000 | 1954-1974 |
