Gregory "Robocop" Rodrigues scored a brutal knockout of Jack Hermansson at UFC 317.

Rodrigues flatlined Hermansson with a left hook and landed one follow-up punch on the ground, ending the featured preliminary bout at the 4:21 mark of the first round Saturday at T-Mobile Arena in Las Vegas. Hermansson was on the canvas for several moments before regaining consciousness.

With the win, Rodrigues bounced back from a TKO loss to Jared Cannonier in a February main event. The 33-year-old Brazilian has won four of his last five Octagon appearances.

Hermansson returned from a 16-month layoff. The 37-year-old Swede has alternated wins and losses in his last 10 fights dating back to 2019.