Wilson Reis made his UFC debut on Saturday night on the preliminary card of UFC 165 and defeated Ivan Menjivar by unanimous decision. 
During the opening round, the fighters exchange punches and kicks for the first four minutes. Both fighters scored with their strikes including Menjivar landing a knee in the clinch position. Reis scored a takedown in the final 40 seconds of the round but was unable to mount much offense while in top position.
In the second round, Reis went for a takedown in the first 90 seconds of the round and Menjivar countered by going for a guillotine choke. The submission would be unsuccessful and Reis decided to stand up instead of working his ground game. After a brief striking exchange, Reis took the fight back to the ground. He struggled to pass his position and Menjivar was able to get back to his feet before the round game to a conclusion.
The final round would open with the fighters exchanging leg kicks and Reis began to look for a submission. He would get the fight to the ground and began to work for an arm triangle choke. Menjivar would escape the submission but could not get back to his feet before the final bell sounded.
All three judges scored the fight for Reis (17-4) and he has now won five fights in a row since exiting Bellator.
UFC 165 Results:
Wilson Reis def. Ivan Menjivar via unanimous decision (30-27, 30-27, 30-27)
Stephen Thompson def. Chris Clements via KO (strikes) – Round 2, 1:27
Mitch Gagnon def. Dustin Kimura via submission (guillotine choke) – Round 1, 4:05
John Makdessi def. Renee Forte via TKO (strikes) – Round 1, 2:01
Michel Prazeres def. Jesse Ronson via split decision (29-28, 28-29, 29-28)
Alex Caceres def. Roland Delorme via split decision (29-28, 28-29, 29-28)
Daniel Omielanczuk def. Nandor Guelmino via KO (strikes) – Round 3, 3:18