MLB Single-Season (Post 1900) Pitching Leaders - Earned Run Average
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
1Dutch Leonard19143625177224.2139246017619530.96
2Mordecai Brown19063632279277.1198326114426631.04
3Bob Gibson196834342813304.2198386226822901.12
4Christy Mathewson19093733268275.1192353614925621.14
 Walter Johnson191348362911346.0232443824336721.14
6Jack Pfiester19073022133195.014325489014901.15
7Addie Joss19084235299325.02324230130241121.16
8Carl Lundgren19072825217207.013027928418701.17
9Pete Alexander191549423612376.12535164241311031.22
10Cy Young19083633303299.02304237150211121.26
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
11Ed Walsh19104536337369.22425261258182051.27
 Walter Johnson19183929298326.02414670162231331.27
13Christy Mathewson19054337328338.2252486420631921.28
14Jack Coombs191045383513353.02485111522431911.30
15Mordecai Brown19095034328342.2246505317227971.31
16Jack Taylor19023633337324.2271484383231111.33
17Walter Johnson19104542388370.02625676313251711.36
18Walter Johnson19125037347369.02595776303331221.39
 Mordecai Brown19073427206233.0180364010720631.39
 Harry Krause19093221167213.0151334913918801.39
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
21Ed Walsh19093128208230.11663650127151121.41
22Ed Walsh190866494211464.03437356269401561.42
 Ed Reulbach19053429285291.22084673152181411.42
 Orval Overall19093832239285.02044580205201131.42
25Christy Mathewson190856443411390.22856242259371151.43
26Fred Anderson1917381881162.01222634698831.44
27Mordecai Brown19084431279312.1214514912329951.47
28Rube Waddell19054634277328.22315490287271001.48
29Joe Wood19152516103157.112026446315521.49
 Walter Johnson19193929277290.12354851147201421.49
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
31Jack Pfiester19063129204250.2173426315320801.51
32Doc White19062824207219.116037389518601.52
33George McQuillan19084842327359.22636191114231721.53
 Dwight Gooden19853535168276.2198476926824401.53
 Eddie Cicotte19174935297346.22465970150281241.53
36Cy Morgan19103634233290.221450117134181201.55
 Pete Alexander191648453816389.03236750167331231.55
 Walter Johnson19154739357336.22585856203271341.55
39Greg Maddux19942525103202.0150353115616601.56
 Howie Camnitz19083826173236.2182416911816921.56
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
41Fred Toney19153623186222.2160397310817621.58
 Eddie Cicotte19134130183268.02244773121181211.58
 Rube Marquard19163620152205.0169363810713651.58
 Chief Bender19103028253250.0182444715523501.58
45Barney Pelty19063430254260.2189465992161121.59
 Addie Joss19042524205192.1160343083141001.59
47George McQuillan19102417133152.11092750719611.60
 Ed Walsh19075646375422.13417587206241841.60
 Luis Tiant19683432199258.1152467326421901.60
50Joe McGinnity19045144389408.0307738614435851.61