José Aldo da Silva Oliveira Júnior]; born September 9, 1986) is a Brazilian mixed martial artist who competes in the Ultimate Fighting Championship. He was the fourth and final WEC Featherweight Champion, becoming the first UFC Featherweight Champion after the UFC/WEC merger. He is a former three-time UFC featherweight champion overall, having been the undisputed champion twice and the interim champion once. He was named Sherdog’s 2009 Fighter of the Year. In the decade from November 2005 through December 2015, Aldo was undefeated in 18 fights. In Sherdog’s April 2017 pound-for-pound ranking, Aldo was called “the greatest featherweight in mixed martial arts history.” As of July 26, 2018, he is #2 in the official UFC featherweight rankings.