SINGLE SEASON
EARNED RUN AVERAGE
11/14/2098
League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments
Rank Player ERA YEAR Open Career Leaderboard
1 Dutch Leonard 0.961 1914  
2 Mordecai Brown* 1.038 1906  
3 Bob Gibson* 1.123 1968  
4 Christy Mathewson* 1.144 1909  
5 Walter Johnson* 1.145 1913  
6 Jack Pfiester 1.154 1907  
7 Addie Joss* 1.163 1908  
8 Carl Lundgren 1.174 1907  
9 Pete Alexander* 1.220 1915  
10 Cy Young* 1.264 1908  
11 Ed Walsh* 1.266 1910  
12 Walter Johnson* 1.270 1918  
13 Christy Mathewson* 1.276 1905  
14 Jack Coombs 1.300 1910  
15 Mordecai Brown* 1.313 1909  
16 Jack Taylor 1.331 1902  
17 Jose Rubio* 1.333 2074  
18 Walter Johnson* 1.362 1910  
19 Charley Radbourn* 1.379 1884  
20 Walter Johnson* 1.390 1912  
21 Mordecai Brown* 1.391 1907  
22 Harry Krause 1.394 1909  
23 Ed Walsh* 1.407 1909  
24 Ed Walsh* 1.416 1908  
25 Ed Reulbach 1.419 1905  
26 Orval Overall 1.421 1909  
27 Christy Mathewson* 1.428 1908  
28 Fred Anderson 1.444 1917  
29 Mordecai Brown* 1.470 1908  
30 Rube Waddell* 1.479 1905  
31 Joe Wood 1.487 1915  
32 Walter Johnson* 1.488 1919  
33 Jack Pfiester 1.508 1906  
34 Doc White 1.518 1906  
35 George McQuillan 1.526 1908  
36 Dwight Gooden 1.529 1985  
37 Eddie Cicotte 1.532 1917  
38 Cy Morgan 1.548 1910  
39 Pete Alexander* 1.550 1916  
39 Walter Johnson* 1.550 1915  
41 Howie Camnitz 1.559 1908  
41 Greg Maddux* 1.559 1994  
43 Tim Keefe* 1.575 1885  
44 Fred Toney 1.576 1915  
45 Eddie Cicotte 1.578 1913  
46 Rube Marquard* 1.580 1916  
47 Chief Bender* 1.584 1910  
48 Barney Pelty 1.588 1906  
49 Addie Joss* 1.591 1904  
50 Ed Walsh* 1.598 1907  
51 Luis Tiant 1.603 1968  
52 Joe McGinnity* 1.610 1904  
53 Ray Collins 1.619 1910  
54 Rube Waddell* 1.621 1904  
55 Howie Camnitz 1.622 1909  
56 Cy Young* 1.624 1901  
57 Greg Maddux* 1.631 1995  
58 Spud Chandler 1.636 1943  
59 Ernie Shore 1.640 1915  
60 Mike Coles 1.643 2059  
61 Ed Summers 1.645 1908  
62 Dean Chance 1.649 1964  
63 Walter Johnson* 1.650 1908  
64 Ed Reulbach 1.651 1906  
65 Russ Ford 1.652 1910  
66 Chief Bender* 1.656 1909  
67 Zack Greinke* 1.657 2015  
68 Sam Leever 1.662 1907  
68 Carl Hubbell* 1.662 1933  
70 Mickey Welch* 1.665 1885  
71 Joe Wood 1.676 1910  
72 Orval Overall 1.677 1907  
73 Ed Reulbach 1.688 1907  
74 Bill Burns 1.691 1908  
74 Nolan Ryan* 1.691 1981  
76 Rube Foster 1.701 1914  
77 Addie Joss* 1.706 1909  
78 Ed Killian 1.713 1909  
79 Walter Johnson* 1.719 1914  
79 Ned Garvin 1.719 1904  
81 Doc White 1.722 1909  
82 Bill Doak 1.723 1914  
82 Pete Alexander* 1.723 1919  
82 Addie Joss* 1.723 1906  
85 Sandy Koufax* 1.728 1966  
86 Bob Ewing 1.731 1907  
87 Vic Willis* 1.733 1906  
88 Sandy Koufax* 1.735 1964  
89 Hippo Vaughn 1.736 1918  
90 Charlie Chech 1.738 1908  
91 Tim Keefe* 1.741 1888  
92 Pedro Martinez* 1.742 2000  
93 Ron Guidry 1.743 1978  
94 Carl Mays 1.744 1917  
94 Earl Moore 1.744 1903  
96 Babe Ruth* 1.752 1916  
97 Al Spalding* 1.753 1876  
98 Fred Goldsmith 1.754 1880  
99 Tom Seaver* 1.760 1971  
100 Doc White 1.763 1905  
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