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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Milt Sexton | 3.024 | 1926-1932 | |
| 2 | Bob Sheehy# | 3.076 | 1940-1947 | |
| 3 | John Bennett | 3.184 | 1923-1930 | |
| 4 | Chuck Perkins | 3.244 | 1917-1926 | |
| 5 | Jack Henderson# | 3.287 | 1941-1947 | |
| 6 | Red Nokes# | 3.373 | 1943-1947 | |
| 7 | Jack Tuttle | 3.378 | 1909-1918 | |
| 8 | Jim Cavender | 3.383 | 1927-1941 | |
| 9 | Johnny Cook# | 3.433 | 1938-1947 | |
| 10 | Jim Cioffi | 3.444 | 1926-1944 | |
| 11 | Bennie Conover | 3.547 | 1932-1945 | |
| 12 | Jim Sharrett | 3.594 | 1927-1933 | |
| 13 | George Rotondi# | 3.609 | 1937-1947 | |
| 14 | John Simms | 3.629 | 1904-1918 | |
| 15 | Ed Rush | 3.648 | 1928-1936 | |
| 16 | Chet Hill | 3.651 | 1926-1944 | |
| 17 | Pete Orr | 3.657 | 1920-1931 | |
| 18 | Pete Sposito | 3.670 | 1921-1931 | |
| 19 | Pete Archer# | 3.704 | 1939-1947 | |
| 20 | Jim Morgan | 3.729 | 1930-1941 | |
| 21 | Ike Gubin | 3.731 | 1909-1921 | |
| 22 | Eddie Hite | 3.732 | 1926-1936 | |
| 23 | John Van Keuren | 3.745 | 1918-1924 | |
| 24 | Charlie K Williams | 3.769 | 1909-1915 | |
| 25 | Duke Brown | 3.781 | 1937-1946 | |
| 26 | Marcel Besson | 3.787 | 1933-1945 | |
| 27 | Alex Modglin | 3.838 | 1926-1937 | |
| 28 | Eddie Rowen | 3.865 | 1909-1916 | |
| 29 | Willie Gomez | 3.898 | 1918-1924 | |
| 30 | Izzy Rayson | 3.899 | 1913-1928 | |
| 31 | Bob Simmons | 3.905 | 1925-1937 | |
| 32 | Johnny Miller | 3.908 | 1909-1916 | |
| 33 | Ben Thompson | 3.920 | 1919-1938 | |
| 34 | Dick Heiliger | 3.922 | 1904-1907 | |
| 35 | Jim Leahy | 3.928 | 1930-1945 | |
| 36 | Bill Cartee | 3.952 | 1907-1920 | |
| 37 | Bill Webber | 3.961 | 1916-1924 | |
| 38 | Topsy Moran | 3.963 | 1931-1939 | |
| 39 | Johnny Reynolds | 3.984 | 1920-1928 | |
| 40 | Denny Gant | 3.988 | 1938-1942 | |
| 41 | Huck Palmer | 3.989 | 1931-1944 | |
| 42 | Bill Postma# | 4.003 | 1936-1945 | |
| 43 | Bert Richards | 4.005 | 1919-1929 | |
| 44 | Ben Yancy | 4.008 | 1925-1937 | |
| 45 | Ed Emmons# | 4.009 | 1938-1946 | |
| 46 | Dan Waldman | 4.030 | 1918-1935 | |
| 46 | Earle Charlton | 4.030 | 1932-1944 | |
| 48 | Al Parker | 4.036 | 1910-1922 | |
| 49 | Curt Bean | 4.046 | 1931-1944 | |
| 50 | Jimmy Cole | 4.056 | 1909-1918 | |
| 51 | Jake Vermillion | 4.064 | 1904-1920 | |
| 52 | Pat Coon | 4.098 | 1912-1925 | |
| 53 | Bunny McCalmont | 4.106 | 1920-1928 | |
| 54 | Joe Mangel | 4.121 | 1905-1913 | |
| 55 | Walter Fennell | 4.139 | 1921-1933 | |
| 56 | Rube Fields# | 4.152 | 1938-1947 | |
| 57 | Jake Skinner | 4.161 | 1904-1910 | |
| 58 | Clarence Crane# | 4.177 | 1939-1945 | |
| 59 | Si Day | 4.179 | 1917-1926 | |
| 60 | Jack Fisher | 4.194 | 1935-1945 | |
| 61 | John Mahoney | 4.199 | 1925-1936 | |
| 62 | Frank Ryan | 4.205 | 1917-1924 | |
| 63 | Harry Smith | 4.210 | 1936-1947 | |
| 64 | Joe Blansit | 4.223 | 1935-1942 | |
| 65 | Alex Church# | 4.228 | 1934-1947 | |
| 65 | Mike Hicks | 4.228 | 1923-1939 | |
| 67 | Buck Harris | 4.244 | 1914-1926 | |
| 68 | Del Smith | 4.253 | 1932-1938 | |
| 69 | Eddie Libby | 4.279 | 1909-1920 | |
| 70 | Dick Dover | 4.314 | 1929-1934 | |
| 71 | Hank Young | 4.325 | 1930-1939 | |
| 72 | Walt Snider | 4.350 | 1906-1920 | |
| 72 | Van Bissonnette | 4.350 | 1928-1937 | |
| 74 | Cotton Hunt | 4.371 | 1917-1924 | |
| 75 | Red Lyman | 4.377 | 1914-1926 | |
| 76 | Gene Roberts | 4.399 | 1931-1938 | |
| 77 | Jim Grassi | 4.424 | 1940-1945 | |
| 78 | Ben Johnson | 4.449 | 1934-1945 | |
| 79 | Benny Jones | 4.450 | 1929-1934 | |
| 80 | Charlie Cortez | 4.485 | 1909-1919 | |
| 81 | Ron Searfoss | 4.533 | 1920-1933 | |
| 82 | Al Miles | 4.536 | 1912-1917 | |
| 83 | Jim Young | 4.597 | 1925-1933 | |
| 84 | John Akard | 4.630 | 1905-1918 | |
| 85 | Daniel Casas | 4.646 | 1908-1923 | |
| 85 | Red Wozniak | 4.646 | 1934-1943 | |
| 87 | Carl Sanders | 4.655 | 1916-1925 | |
| 88 | Jim Wisecarver | 4.671 | 1918-1927 | |
| 89 | Brick Williams | 4.723 | 1909-1921 | |
| 90 | Charlie Bowman | 4.731 | 1912-1923 | |
| 91 | Pete Mathews | 4.751 | 1920-1928 | |
| 92 | John Bradbury | 4.752 | 1935-1945 | |
| 93 | Red Harbin | 4.780 | 1924-1937 | |
| 94 | Joe Wolfenden | 4.855 | 1926-1942 | |
| 95 | Ralph Alexander | 4.946 | 1909-1921 | |
| 96 | Johnny Cosgrove | 4.972 | 1906-1918 | |
| 97 | Alex Martin | 5.009 | 1910-1919 | |
| 98 | Jimmy Schmader | 5.013 | 1934-1945 | |
| 99 | Raymond Kirchner | 5.044 | 1917-1928 | |
| 100 | Tommy Arren | 5.230 | 1920-1929 |
