Arnold "Arnie" Horween (July 7, 1898 – August 5, 1985) was an American football player and coach. He played fullback for Harvard University from 1919 to 1920 and later played in the National Football League for the Racine Cardinals in 1921 and Chicago Cardinals from 1922 to 1924. He was a player–coach for the Cardinals from 1923 to 1924. He returned to Harvard as the school's football coach from 1926 to 1930, compiling a record of 21–17–3. His brother Ralph Horween also played for Harvard and the Chicago Cardinals. Horween and his brother played for the Cardinals under the name McMahon to protect their family's social status.