José Aldo participates in MMA.
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 . Mixed martial arts ( MMA ) is a full-contact combat sport that allows both striking and grappling , both standing and on the ground , using techniques from other combat sports and martial arts .