MLB Single-Season (Post 1900) Pitching Leaders - Earned Run Average
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
451Harry Brecheen19483330217233.1193584914920712.24
 Vean Gregg19134434233285.225871124166201332.24
 Vic Willis19093935244289.2243728395221112.24
 George Kaiserling19154129165261.1246657375151522.24
 Nap Rucker19093833286309.124577101201131912.24
 Tom Walker19042424222217.019654536415802.24
 Babe Adams19103430163245.0217616010118902.24
 Randy Jones19753736186285.02427156103201202.24
 Chris Carpenter2009282831192.2156483814417402.24
 Lew Richie1909331492176.21584462538832.24
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
 Elmer Riddle19413322154216.218054598019412.24
462George Mullin19034136316320.228480106170191522.25
 Atlee Hammaker1983232383172.1147433212710902.25
 Bill Duggleby19064230225280.1241706683131922.25
 Sam Jones19182421165184.015146704416502.25
 Joe McGinnity19064537323339.23168571105271222.25
 Gus Bell19073527203263.222266778881612.25
 Earl Moore19042624221227.21865761139121102.25
 Eddie Plank19062625215211.2173535110819602.25
470Joe Benz19144835164283.12457166142141922.26
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
 Bill Walker19313728196239.1212606412116932.26
 Tex Hughson19442823192203.1172514111218552.26
 Rankin Johnson19143227164219.1180556384131402.26
 Orel Hershiser19883534158267.0208677317823812.26
 Pedro Martinez2002303020199.1144504023920402.26
 Bill Dinneen19033734326299.02557566148211322.26
 Doc White19074635246291.02707338141271312.26
 Cy Young19093534303295.02677459109191502.26
 Eddie Plank19054141354346.22878775210241202.26
 Christy Mathewson19034542373366.132192100267301322.26
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
 Ray Washburn1968313084215.0191544712414802.26
 Jimmy Ring19193218122183.015046516110932.26
 Chief Bender19142823147179.0159455510717322.26
 Hank Robinson19123316110175.014644307912722.26
 Erv Kantlehner19152918101163.013541586451232.26
 Wheezer Dell1916321692155.01433943768912.26
 Jake Weimer19053330262250.12126380107181212.26
488Jon Matlack19783533182270.02526851157151312.27
 Willie Sudhoff19033835305293.22627456104211502.27
 Chick Fraser19082617112162.214141616611922.27
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
 Ed Killian19053937338313.126379102110231402.27
 Al Orth19013533306281.2250713292201212.27
 Tiny Bonham19422827226226.019957247121502.27
 Felix Hernandez2010343461249.21946370232131202.27
 Russ Ford19113733261281.12517176158221102.27
 Eppa Rixey19173936234281.12497167121162112.27
 Matt Harvey2013262611178.113545311919502.27
 Rick Reuschel1985312691194.0153495213814812.27
 Jake Peavy2004272700166.1146425317315602.27
 Elmer Stricklett19072926254229.2211586569121402.27