UFC Vegas 121: Raul Rosas Jr. gets scary fifth-round KO of Raoni Barcelos, who has to be stretchered out

Raul Rosas Jr. emerged from UFC Vegas 121 with the biggest win of his career. We’re still not quite sure how.

The 21-year-old rising star defeated Raoni Barcelos in his first career main event, getting a needed knockout in the fifth round. It’s unclear how exactly got the KO, as the veteran appeared to loose consciousness either as her was taken down or after.

Barcelos has to be carried out of the Octagon on a stretcher, a surreal ending to what had been shaping up to be a Fight of the Year contender.