Proctor held an amateur record of 5-1 before starting his professional career in August 2008, winning his first fight by decision. Over the next three years he amassed a record of 7-1.
Proctor was one of 32 Lightweight fighters announced by the UFC to participate in first live season of The Ultimate Fighter reality show. Proctor won his way into the house when he defeated Jordan Rinaldi by a guillotine choke submission in the first round. With that victory, he was chosen as the fourth pick by Team Faber. Proctor won his next match against Team Cruz's seventh pick, Chris Tickle. He defeated Tickle with a rear-naked choke submission near the end of the first round, gaining entry into the quarter-finals. For his quarter-final fight, Proctor was matched up with striking specialist James Vick. Proctor was unable to take Vick down in the fight and was outmatched on the feet. Proctor lost the fight by unanimous decision after the second round, thus eliminating him from the competition.
Proctor made his UFC debut against fellow cast member Jeremy Larsen on June 1, 2012, at. He won the fight via TKO due to a combination of a knee and punches in the first round. Proctor next faced Ramsey Nijem on December 8, 2012, at UFC on Fox 5. He lost the fight via unanimous decision. Proctor was expected to face Al Iaquinta on April 27, 2013, at UFC 159. However, the bout was scrapped as both fighters sustained training injuries leading up to the fight. Proctor faced Cristiano Marcello on February 15, 2014, at UFC Fight Night 36. He won the fight via unanimous decision. Proctor faced Justin Salas on July 16, 2014, at UFC Fight Night 45. Proctor won the bout via second-round TKO. Proctor faced Yancy Medeiros on December 12, 2014, at. He lost the fight via submission in the first round after being dropping with a spinning back kick to the body. Proctor faced Justin Edwards on June 6, 2015, at UFC Fight Night 68. He won the back-and-forth fight via submission with just seconds remaining in the final round, resulting in the latest submission win in the UFC Lightweight division. Proctor faced Magomed Mustafaev on December 12, 2015, at UFC 194. He lost the fight via TKO in the first round. Proctor was expected to face Erik Koch on May 29, 2016, at UFC Fight Night 88. However, Proctor pulled out of the fight on April 21 citing injury and was replaced by Shane Campbell. Proctor faced Bryan Barberena on April 22, 2017, at UFC Fight Night 108. He lost the fight via TKO in the first round and was subsequently released from the promotion.
