UFC 131: Dos Santos vs. Carwin was a mixed martial arts event held by the Ultimate Fighting Championship on June 12 (aus time), 2011 at the Rogers Arena in Vancouver, British Columbia.
Brock Lesnar was scheduled to fight Dos Santos after their coaching stint on The Ultimate Fighter 13, but due to a reoccurring illness he was replaced by Carwin. Originally, a matchup between Carwin and Jon Olav Einemo was scheduled for this event. Einemo remained on the card and faced Dave Herman, who was pulled from a matchup with Joey Beltran as a result. Beltran was matched up with Aaron Rosa.
Anthony Perosh was expected to face Krzysztof Soszynski at this event, but Perosh was forced from the bout with an injury and replaced by Igor Pokrajac. However, Pokrajac was forced to pull out of the bout due to injuries just days before the event and was replaced by Mike Massenzio.
Here are the results from the main card:
Donald Cerrone vs. Vagner Rocha
Cerrone defeated Rocha via unanimous decision (30-27, 30-27, 30-26).
Jon Olav Einemo vs. Dave Herman
Herman defeated Einemo via TKO (punches) at 3:19 of round 2.
Demian Maia vs. Mark Muñoz
Muñoz defeated Maia via unanimous decision (29-28, 29-28, 30-27).
Kenny Florian vs. Diego Nunes
Florian defeated Nunes via unanimous decision (29-28, 29-28, 30-27).
Junior dos Santos vs. Shane Carwin
Dos Santos defeated Carwin via unanimous decision (30-27, 30-27, 30-27).