Ghana-American light heavyweight used his Taekwondo background to go 11-4 in his first 15 professional fights.
He won his MMA debut with a leg submission on February 10, 2007.
He earned a 7-0 undefeated record to start his MMA career.
He was the first member of his family to be born in the United States.
He suffered his fourth career loss after a TKO stoppage against Houston Alexander in August 2011.