Career
He made his UFC debut in late 2013 on the UFC Fight Night: Hunt versus Bigfoot card.
Early career
Santos faced Danilo Pereira on August 29, 2009, at Win Fight & Entertainment 4 for the WFE Middleweight Championship, winning via unanimous decision. Bellator Mobile Marketing Association
Undefeated at 12–0, Santos made his Bellator debut against Giva Santana at Bellator 61 on March 16, 2012.
He was then expected to face Brian Rogers on April 20, 2012 at Bellator 66, however Santos was forced out of the bout due to a shoulder injury.
Ultimate Fighting Championship
Santos lost the fight via unanimous decision. Santos faced Chris Camozzi at UFC 175 on July 5, 2014.
Santos next faced Elias Theodorou on October 4, 2014 at UFC Fight Night: MacDonald versus Saffiedine. He lost the fight via unanimous decision.
Win Fight & Entertainment
WFE Middleweight Championship (One time).