Naddour won the bronze medal in pommel horse Sunday at the Rio 2016 Olympic Games.
In the qualification, Naddour qualified seventh, so he was a surprise medalist.
However, he is a four-time national champion in the event and was seventh at the 2015 world championships and sixth in 2014.
male gymnast in an event final since Jonathan Horton won the silver medal on the horizontal bar at the Beijing 2008 Olympic Games.
Naddour scored the first pommel horse medal for Team USA since Peter Vidmar and Tim Daggett, now the NBC commentator, won gold and bronze at the 1984 Los Angeles Olympic Games.