John Frederick Hiller is a Canadian former baseball relief pitcher who played 15 seasons in Major League Baseball (MLB) for the Detroit Tigers between 1965 and 1980. A native of Toronto, he joined the Tigers in 1965 and was a member of the 1968 Detroit Tigers team that won the World Series. He set a major league record by starting a game with six consecutive strikeouts in 1968.

The Detroit Tigers are an American professional baseball team based in Detroit. The Tigers compete in Major League Baseball (MLB) as a member of the American League (AL) Central Division. One of the AL's eight charter franchises, the club was founded in Detroit as a member of the minor league Western League in 1894 and is the only Western League team still in its original city. They are also the oldest continuous one name, one city franchise in the AL. Ty Cobb, who played his first season with Detroit in 1905, later became the first Tiger to be inducted into the National Baseball Hall of Fame in 1936.