The Pitcher of the Month award is a Major League Baseball award named by each league for each month of the regular season. The National League started recognizing the award in 1975. The American League followed in 1979. Upon the introduction of each league's award, pitchers became ineligible for the (position players') player of the month award.
Major League Baseball Pitcher of the Month Award Wikipedia
Players listed with multiple occurrences are denoted by parentheses containing the ordinal.
The highest number of Pitcher of the Month awards won by a single player is Roger Clemens' 15. He is followed by Greg Maddux (10), Pedro Martínez (8), Randy Johnson (8), and Johan Santana (8).