Former heavyweight fighter Chad Griggs will make his light heavyweight debut at UFC On Fox IV against Phil Davis. Griggs made his UFC debut at UFC 145 against Travis Browne, a loss which prompted Griggs to change weight classes. Davis is also coming off of a loss, which was a decision loss to Rashad Evans in the main event of UFC On Fox II. UFC On Fox IV takes place on August 4th at the Staples Center in Los Angeles, California with Brian Stann and Hector Lombard headlining.