UFC 91: Couture vs. Lesnar was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on November 15, 2008, at the MGM Grand Garden Arena in Las Vegas, Nevada. The main event featured the return of UFC Heavyweight Champion Randy Couture versus WWE's Brock Lesnar in a title bout. The decision to grant Lesnar—who was 1–1 in UFC fights at the time—the title shot was controversial at the time. 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.
Brock Lesnar
Randy Couture
Kenny Florian
Joe Stevenson
Dustin Hazelett
Tamdan McCrory
Gabriel Gonzaga
Josh Hendricks
Demian Maia
Nate Quarry
Aaron Riley
Jorge Gurgel
Jeremy Stephens
Rafael dos Anjos
Mark Bocek
Alvin Robinson
Matt Brown
Ryan Thomas