Clarence McKay "Ace" Parker (May 17, 1912 – November 6, 2013) was an NFL quarterback who played for the Brooklyn Dodgers (1937–1941), Boston Yanks (1945), and the New York Yankees of the AAFC. He was an All-American tailback at Duke University in 1936. Parker also played Major League Baseball during 1936 and 1937 with the Philadelphia Athletics.