18-year-old Raul Rosas Jr. only needs 54 seconds to knock out Terrence Mitchell at Noche UFC in Las Vegas. #NocheUFC #UFC #Rosas ✔ 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