José Aldo da Silva Oliveira Junior (Portuguese pronunciation: ; born September 9, 1986) is a Brazilian mixed martial artist in the Ultimate Fighting Championship (UFC). He was the fourth and final WEC Featherweight Champion and thus, became the first UFC Featherweight Champion during the UFC/WEC merger. He is currently the UFC Interim Featherweight Champion. He was named Sherdog's 2009 Fighter of the Year. He is currently #5 in official UFC pound-for-pound rankings, having been ranked as high as #1 in 2015, and ranked the #2 featherweight in the world and #8 pound-for-pound by Sherdog. In the decade between losses in November 2005 and December 2015, Aldo was undefeated in 18 fights.
