[4] The main event featured the return of UFC Heavyweight Champion Randy Couture versus WWE's Brock Lesnar in a title bout.

Some felt it was premature and marketing driven, while others argued the relative lack of depth in the heavyweight division at the time left no clear-cut contenders to the belt.

[5] Matthew Riddle was forced to withdraw from his bout with Ryan Thomas due to an injury.

[7] Amir Sadollah withdrew from his fight against Nick Catone due to a leg infection.

Also future Lightweight champion Rafael dos Anjos made his UFC debut at this event.