Donald Eugene Liddle (May 25, 1925 – June 5, 2000) was an American left-handed pitcher in professional baseball who played four seasons in the Major Leagues for the Milwaukee Braves, New York Giants and St. Louis Cardinals from 1953 through 1956. Born in Mount Carmel, Illinois, he batted left-handed, stood 5 feet 10 inches (1.78 m) tall and weighed 165 pounds (75 kg). Liddle died, aged 75, in his hometown of Mount Carmel, Illinois.