Host City: St. Louis, United States
Venue(s): Physical Culture Gymnasium, Washington University, St. Louis
Date Started: September 21, 1904
Date Finished: September 22, 1904
Format: Single elimination tournament.
There were four entrants with Al Young and Harry Spanjer winning their first round matches to advance to the final, which was won by Young by decision. Young had won his first round match over Jack Egan (sometimes spelled Eagan). But more than a year later, Egan was discovered to have been fighting under an alias. This was not uncommon at the time, as many more wealthy citizens did not want to be associated with sports.
Egan's real name was Frank Floyd, and he came from Bryn Mawr, Pennsylvania. While this may not seem serious, by the rules of the AAU it was illegal to fight under an assumed name, a so-called "ringer". In November 1905, the AAU decided that "Egan" would be disqualified from all AAU competitions, and he would have to return his prizes. The Atlantic Association that had knowingly accepted Floyd's application as Egan was also expelled from the AAU.