List of Major League Baseball single-season records
Player Team Wins Season
Jim Bagby , Sr Cleveland Indians 31 1920
Lefty Grove Philadelphia Athletics 31 1931
Denny McLain Detroit Tigers 31 1968
Dizzy Dean St. Louis Cardinals 30 1934
Hal Newhouser Detroit Tigers 29 1944
Dazzy Vance Brooklyn Dodgers 28 1924
Lefty Grove Philadelphia Athletics 28 1930
Dizzy Dean St. Louis Cardinals 28 1935
Robin Roberts Philadelphia Phillies 28 1952
Pitching records -- Wins
This is a list of single-season records in Major League Baseball.