José Aldo died at birth.
José Aldo . 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 , 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 . ''