Watch as Jiri Prochazka knocks out Khalil Rountree Jr. in the third round of their light heavyweight fight at UFC 320 in Las Vegas. #UFC320 #UFC #Jiri ✔ For more UFC, sign up for ESPN+ espnplus.com/ufc/youtube ✔ Get the ESPN App: espn.com/espn/apps/espn ✔ Subscribe to ESPN on YouTube: es.pn/SUBSCRIBEtoYOUTUBE ✔ Subscribe to ESPN FC on YouTube: bit.ly/SUBSCRIBEtoESPNFC ✔ Subscribe to NBA on ESPN on YouTube: bit.ly/SUBSCRIBEtoNBAonESPN ✔ Watch ESPN on YouTube TV: es.pn/YouTubeTV