Rafael dos Anjos
After over a year away from the sport, Diaz returned from his self-imposed hiatus and faced Rafael Dos Anjos on December 13, 2014 at UFC on Fox 13. Diaz missed weight, coming in at 160.6 pounds. He was given additional time to make the lightweight limit, and cut down to 155.2. However, he was still fined 20 percent of his purse, which went to Rafael dos Anjos. Diaz, who seemed unmotivated and annoyed for most of the fight, lost the one-sided fight via unanimous decision (30–26, 30–26, and 30–27).