Luke Daniel Hamlin (July 3, 1904 – February 18, 1978) was an American professional baseball pitcher. He played in Major League Baseball (MLB) for the Detroit Tigers (1933–34), Brooklyn Dodgers (1937–41), Pittsburgh Pirates (1942), and Philadelphia Athletics (1944). Born in Ferris Center, Michigan, Hamlin won the nickname "Hot Potato" because of his tendency to juggle the ball while getting ready to pitch. He pitched two years with the Tigers, going 3–3 in 23 games for the Bengals. Hamlin died in 1978 at age 73 in Clare, Michigan.