Mixed martial artist who became a UFC Interim Welterweight Champion and WEC Welterweight Champion.
He began his fighting career in World Extreme Cagefighting and also competed in both Shootboxing and Pancrase in Japan.
He became a brown belt in Brazilian Jiu-Jitsu.
He has a son with his wife Seager Marie McCullah.
He became the second man to knock down George St. Pierre in a fight in November, 2012.