According to EPSN.com George St-Pierre, 37, is going to announce his retirement from UFC on Thursday in Montreal.

St-Pierre made his MMA debut in January 2002. He started his career a perfect 5-0 before signing with the UFC in 2003. He won the UFC welterweight title at UFC 65 in 2006 when he defeated Matt Hughes. He ended up losing the title in his next fight, though, when he was upset by Matt Serra at UFC 69 in 2007. That fight is considered one of the greatest upsets in MMA history. GSP would avenge that loss the following year at UFC 83, and in doing so regained the belt at the first UFC event in his hometown of Montreal.

St-Pierre (26-2), was born in Saint-Isidore, Quebec, last fought at UFC 217 in November 2017, when he defeated Michael Bisping to win the UFC middleweight title at Madison Square Garden.