23 September 1926 Jack Dempsey, who reigned as the world heavyweight boxing champion from 1919 to 1926, was defeated by Gene Tunney.
JACK DEMPSEY - Scythian https://www.youtube.com/watch?v=8wz_PGoDt38
Jack Dempsey, article from Wikipedia https://en.wikipedia.org/wiki/Jack_Dempsey