67 seconds on the clock. Silva therefore became the inaugural Jungle Fight Welterweight champion. Ultimate Fighting Championship Silva signed with the UFC in early 2011. He was expected to make his debut against Mike Swick at UFC 134. However, on August 4, 2011, it was announced that Swick had to withdraw from the bout due to a knee injury and was replaced by Luis Ramos. Silva won quickly via first round TKO due to punches. Silva was expected to face promotional newcomer Siyar Bahadurzada on January 14, 2012 at UFC 142. However, Bahadurzada was forced out of the bout with an injury and replaced by Carlo Prater. After missing a looping right hook in the opening seconds of the fight, Silva quickly followed with a left knee to the body which effectively knocked Prater down. Prater caught Silva's knee and held on to his leg as Silva began attacking with hammer fists and punches to the head. During the attack, the referee, Mario Yamasaki, repeatedly warned Silva not to hit the back of the head. When Prater appeared to go unconscious and could no longer intelligently defend himself, Yamasaki stepped in and stopped the fight. Although Silva appeared victorious, Yamasaki disqualified Silva for strikes to the back of the head. The disqualification was later upheld by the UFC. Silva then faced Charlie Brenneman on June 8, 2012 at UFC on FX 3. Silva won the fight with a rear-naked choke late in the first round. Silva faced Jon Fitch on October 13, 2012 at UFC 153 in Rio de Janeiro, Brazil. After three rounds, Silva lost the fight via unanimous decision (30–27, 29–28, and 29–28). The performance earned both participants Fight of the Night honors. Silva was expected to face Jay Hieron on February 2, 2013 at UFC 156. However, Silva pulled out of the bout citing an injury and was replaced by promotional newcomer Tyron Woodley. Silva was expected to face John Hathaway on June 8, 2013 at UFC on Fuel TV 10. However, Hathaway was pulled from the bout in late April and replaced by Jason High, who was already scheduled on the card against Ildemar Alcantara. Silva won the fight via triangle armbar submission. The finished earned him his second Submission of the Night bonus. Silva faced Dong Hyun Kim on October 9, 2013 at UFC Fight Night 29. Kim defeated Silva via second round KO. Silva