*Data include American League pitchers between 1955 to 1966, when the award was given only to the single best pitcher in the majors.

WAR for pitchers: A single number represents the number of wins the pitcher added to the team above what a replacement player — essentially, a call-up from the minor leagues — would add, according to the methodology of baseball-reference.com. A player with a WAR of five or higher is having an all-star season. Eight or higher is MVP-caliber.