Since the foundation of the International League (IL) in 1912, its pitchers have thrown 165 no-hitters, which include 17 perfect games. Of these no-hitters, 81 were pitched in games that lasted at least the full 9 innings, while 84 were pitched in games shortened due to weather or that were played in doubleheaders, which are typically 7 innings. Only 4 of the league's 17 perfect games were tossed in full 9-inning games. Twenty-three no-hitters were combined—thrown by two or more pitchers on the same team.