José Aldo died at birth.
José Aldo da Silva Oliveira Junior ( [ ʒoˈzɛ ˈaldu ] ; born September 9 , 1986 ) is a Brazilian mixed martial artist in the Ultimate Fighting Championship and the UFC Featherweight Champion , currently in his second reign . He is currently a two-time UFC Featherweight Champion , having been promoted from interim champion in the wake of former champion Conor McGregor relinquishing the title on November 27 , 2016 . In the decade between losses in November 2005 and December 2015 , Aldo was undefeated in 18 fights , before being defeated by Conor McGregor at UFC 194 . In Sherdog 's 2017 Pound-For-Pound ranking , Aldo was called `` the greatest featherweight in mixed martial arts history . ''