[6] 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.

Santos next faced Elias Theodorou on October 4, 2014 at UFC Fight Night: MacDonald vs.

On December 31, 2016, Santos made his World Series of Fighting debut at WSOF 34 against undefeated Vagab Vagabov.

Starting with a victory against Sadibou Sy at PFL 3 on July 5, 2018, in Washington, D.C., the fighter then continued the winning streak with another unanimous decision victory over John Howard at PFL 6 in Atlantic City on August 16 of the same year.

A return to form came with a unanimous decision win against Carlos Matos at Titan FC 81 on April 14, 2023, in Santo Domingo, Dominican Republic.