Duane Frederick "Duke" Maas (January 31, 1929 – December 7, 1976) was an American professional baseball baseball player and right-handed pitcher who spent all or parts of seven seasons (1955–1961) in Major League Baseball with the Detroit Tigers, Kansas City Athletics and New York Yankees. Born in Utica, Michigan, he was listed as 5 feet 10 inches (1.78 m) tall and 170 pounds (77 kg). Maas was a member of the 1958 World Series champion Yankees. He saw action in one game, relieving Bob Turley during the first inning of Game 2 when the Milwaukee Braves scored seven runs.