He has also won the King of Pancrase Openweight Championship and was a finalist in the PRIDE 2006 Openweight Grand Prix and the Strikeforce Heavyweight Grand Prix Championship.
Барнетт — экс-чемпион UFC и Pancrase в тяжёлом весе, а также финалист Pride Grand Prix 2006 и Гран-При тяжеловесов Strikeforce.