Clarence Francis "Heinie" Mueller (September 16, 1899 – January 23, 1975) was an American center and right fielder in Major League Baseball. Born in Creve Coeur, Missouri, Mueller debuted September 25, 1920, and played his final game on June 15, 1935. He played for the St. Louis Cardinals (1920–1926), New York Giants (1926–1927), Boston Braves (1928–1929), and St. Louis Browns (1935). In 11 seasons, Mueller played in 693 games (367 as a center fielder) and had a batting average of .282 (597-for-2118) with 22 home runs and 272 RBI. He died in DeSoto, Missouri, at age 75.