Olympic wrestler and retired MMA fighter had a 22-9 record to end his career.
He won a gold medal at the Greco-Roman Wrestling World Cup in 1996.
He took home a silver Olympic medal in wrestling at the 2000 Sydney Games.
He had two children, James and Robin, with his wife Angie Lindland.
He was knocked out by a Vitor Belfort punch on January 24, 2009.