Claim: The fight between Gabriel Gonzaga, a Brazilian professional boxer and mixed martial artist that competed in the Heavyweight division of the Ultimate Fighting Championship, and Junior dos Santos eventually took place on 21 March 2010 with Gonzaga losing via knockout in the first round, then he was defeated by Brendan Schaub on 23 October 2010 at UFC 121.
Evidence: Gabriel Gonzaga Santos Nogueira (Portuguese pronunciation: [ɡabɾiˈew ɡõˈzaɡɐ; born 18 May 1979) is a Brazilian professional boxer and mixed martial artist, who competed in the Heavyweight division of the Ultimate Fighting Championship. Junior dos Santos 21 March 2010 Loss KO (punches) 1 Brendan Schaub 23 October 2010 UFC 121