Raul Rosas Jr. scores fifth-round knockout over Raoni Barcelos at UFC Vegas 121

Raul Rosas Jr. scored the biggest win of his career in his first main event, knocking out Raoni Barcelos in the fifth round at UFC Vegas 121. Barcelos was stretchered from the Octagon.

The report said Barcelos appeared to lose consciousness during the takedown or immediately afterward, but it was unclear exactly how the knockout happened.