Gary Wayne Serum (born October 24, 1956) is an American former Major League Baseball pitcher. He played seasons at the major league level for the Minnesota Twins. He was signed by the Twins as an amateur free agent in 1975. Serum played his last professional season with the New York Yankees' Double-A Nashville Sounds and Triple-A Columbus Clippers in 1982. Serum grew up in Alexandria, Minnesota and graduated from Alexandria Area High School.