Donald James Cooper (born January 15, 1956) is a former pitcher in Major League Baseball (MLB) who spent parts of four seasons with the Minnesota Twins (1981–1982), Toronto Blue Jays (1983) and New York Yankees (1985). He has been the pitching coach of the Chicago White Sox since July 22, 2002. Under his tutelage, both Mark Buehrle and Philip Humber pitched perfect games, with the former also getting a no-hitter and the White Sox won the 2005 World Series.
