MLB Single-Season (Post 1900) Pitching Leaders - Earned Runs Allowed
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
451Sid Hudson19423531191239.12661167072101724.36
 Cowboy Jones19003936293292.23341168268131903.57
 Jack Lamabe1964392530177.12351165710991315.89
 Hod Lisenbee19303731150237.12541168647101704.40
 Johnny Marcum19343731172232.02571168892141104.50
 Van Mungo19364537222311.2275116118238181933.35
 Bobo Newsom19394137243291.2272116126192201123.58
 Togie Pittinger19054637294337.1311116104136231423.09
 Pedro Ramos1961423493264.126511679174112023.95
 Jimmy Ring19213430210246.02581168888101914.24
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
 Buck Ross1939292861174.0216116954361406.00
 Red Ruffing19313730191237.024011687132161424.41
 Red Ruffing19363333253271.027411690102201203.85
 Bill Voiselle19454135144232.124911697115141404.49
 Irv Young19064341374358.134911683151162502.91
 Ricky Romero2012323210181.019811610512491405.77
467Bill Gullickson1987353541213.021811550117141304.86
 Rick Reuschel1974413882240.226211583160131204.30
 John Butcher1985343382207.22391154392111404.98
 Mike Caldwell19833232102228.12691155158121104.53
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
 Mike Flanagan19803737122251.127811571128161304.12
 Bruce Hurst1985353161229.124311570189111304.51
 Steve Renko1971403793275.2256115135129151403.75
 Mike Witt19883434122249.226311587133131604.15
 Neal Heaton1984383441198.22311157575121505.21
 Kenny Rogers2000343420227.125711578127131304.55
 Greg W. Harris1993353540225.123911569123111704.59
 Kevin Tapani1996343410225.123611576150131004.59
 Mark Leiter1997313130182.221611564148101705.67
 Mark Clark1998333321213.22361154816191404.84
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
 Jeff Juden1998323020178.11821158414881405.80
 Cal Eldred1993363681258.023211591180161604.01
 Pedro Astacio2000323230196.12171157719312905.27
 Dave Mlicki2001342900167.22031157497111106.17
 Brad Radke1996353530232.023111557148111604.46
 Matt Morris2006333320207.221811563117101504.98
 Cory Lidle2004343453211.122411561126121204.90
 Kyle Lohse2004353411194.02401157611191305.34
 Bill Stoneman1969423685235.2233115123185111904.39
 Dummy Taylor19033331181244.23061158994131304.23
PLAYERYRGGSCGSHIPHERBBSOWLSVERA
 Buster Brown19114225130241.02581151167681824.29
 Joe Bush19203532180243.22871159488151514.25
 Sugar Cain19363429151211.22481158450151104.89
 Mike Cuellar19704040214297.22731156919024803.48
 Jimmie Deshong19363431162223.22551159659181024.63
 George Earnshaw19314330233281.22551157515221763.67
 Wes Ferrell19314035272276.1276115130123221233.75
 Jack Fisher1967393071220.12511156411791804.70
 Russ Ford19123635300291.231711579112132103.55
 Oral Hildebrand19373027121201.1228115877581715.14