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On November 13, 2004, L'Heureux challenged Steve McKay (record 5-1) for the vacant Canadianheavyweight championship in Montreal. After knocking down McKay in the eighth round with a body shot, L'Heureux then knocked him out for good 27 seconds into the ninth round. However, in his first fight after winning the prestigious title in 2005, L'Heureux was viciously pummeled by American clubfighter (33-8) to lose his undefeated ring record by a technical knock out at 2:31 of the first round. He beat undefeated Olympian Art Binkowski on points later that year.[citation needed]
The 6-foot 5-inch tall right-hander suffered his second loss when he was knocked out in the 7th round by David Cadieux on May 12, 2006. He lost the rematch on points. On May 26, 2007, he suffered his fourth loss to the undefeated Alexander Povetkin by a knockout in the 2nd round. L'Heureux subsequently won four straight fights including two fights against Stephane Tessier. His first fight with Tessier earned L'Heureux the Quebec Boxing Council (CQB) Heavyweight Title. He died of a heart attack on October 7. 2018, aged 46.[2]