Renan Barao
An interim champion who was promoted to undisputed, Renan Barao first won the title in 2012. Barao bested Urijah Faber at UFC 149, earning a pair of defenses as interim champ over Michael McDonald and Eddie Wineland.
In 2014, he was promoted and downed Faber once more. Barao held the undisputed belt for 138 days.
