Daniel Ryan Cormier (born March 20, 1979) is an American former professional mixed martial artist, freestyle wrestler, and current color commentator for the Ultimate Fighting Championship (UFC). As a former UFC Light Heavyweight and Heavyweight Champion, Cormier is the second fighter in UFC history to hold titles in two weight classes simultaneously and is the first fighter to have title defenses in two divisions. He is widely regarded as one of the greatest mixed martial artists of all time.

As an international wrestler, Cormier was a six-time US World or Olympic Team Member, a World bronze medalist, a World Cup runner-up, a 2003 Pan American Games gold medalist (bronze in 2007), and a two-time Pan American champion. In folkstyle wrestling, Cormier was an NCAA Division I national finalist (with loss to the eventual four-time NCAA champion Cael Sanderson from Iowa State) and two-time Big 12 Conference runner-up for the Oklahoma State Cowboys. He was also a two-time NJCAA champion.

Prior to competing in the UFC, Cormier was the Strikeforce Heavyweight Grand Prix Champion and King of the Cage Heavyweight Champion.