DALLAS, TX - MARCH 14: (L-R) Rafael dos Anjos fights with Anthony Pettis in the Lightweight Title bout during the UFC 185 event at American Airlines Center on March 14, 2015 in Dallas, Texas.

Rafael dos Anjos manhandled a hapless Anthony Pettis over five rounds to become the new lightweight champion at UFC 185.

Rafael dos Anjos manhandled a hapless Anthony Pettis over five rounds to become the new lightweight champion at UFC 185.

Rafael dos Anjos manhandled a hapless Anthony Pettis over five rounds to become the new lightweight champion at UFC 185.

At 40 years old, dos Anjos is likely done competing for UFC titles at this stage of his career. He won the UFC lightweight championship in a dominant performance against Anthony Pettis at UFC 185.