Jerry Koosman (born December 23, 1942) is a former baseball player with the New York Mets, Minnesota Twins, Chicago White Sox and Philadelphia Phillies. He was a pitcher. He won more than 200 games in his career. In 1969, he was on the Mets team that won the baseball championship the World Series. Koosman won two games for the Mets in the 1969 World Series.
In 1968, Koosman finished 2nd by one vote to Johnny Bench in the voting for National League Rookie of the Year, given to the best first year player in the league. In 1976, Koosman finished 2nd to Randy Jones in the voting for National League Cy Young Award, given to the league's best pitcher. Koosman won at least 20 games in both 1976 and 1979.