The Boston Red Sox are a Major League Baseball franchise based in Boston, Massachusetts, also known in their early years as the "Boston Americans" (1901–1907). They play in the American League East division. Pitchers for the Red Sox have thrown 18 no-hitters in franchise history.
A no-hitter is officially recognized by Major League Baseball "when a pitcher (or pitchers) allows no hits during the entire course of a game, which consists of at least nine innings.