Mixed martial artist who was one of the sport's premier welterweights during his time in the UFC. A three-time UFC champion, he went 12-2 in title fights during his career. He took the middleweight title from Michael Bisping in 2017, making him the fourth fighter to be a multi-division champion.
Bullied in school, he learned Kyokushin karate from his father when he was seven years old. He worked as a bouncer and garbageman before he went pro.
He was named Fighter of the Year by several publications in 2009 and was nominated for an ESPY for Best Fighter in 2008, 2010, and 2011. He released his first book in 2013 titled "The Way of the Fight."
He was born to Roland and Pauline St-Pierre in Saint-Isidore, Quebec.
Although he left the sport in 2013 with a record of 25-2, one of those losses was a major upset at UFC 69 when he lost the welterweight title to Matt Serra.