Donald Elliott Heinkel (born October 20, 1959 in Racine, Wisconsin) is a retired Major League Baseball pitcher. He played during two seasons at the major league level for the Detroit Tigers and St. Louis Cardinals. He was drafted by the Tigers in the 30th round of the 1982 amateur draft. Heinkel played his first professional season with their Rookie league Bristol Tigers, Class A-Advanced Lakeland Tigers, and Double-A Birmingham Barons in 1982, and his last with the San Diego Padres' Double-A Wichita Wranglers in 1993. Heinkel now resides in Alabama with his wife and 11 children. He practices medicine in the Muscle Shoals, Alabama area.