Watch as Esteban Ribovics knocks out Terrance McKinney with a head kick 37 seconds into their lightweight fight on the #UFCStLouis prelims.#UFC #RIbovics✔ For more UFC, sign up for ESPN+ http://espnplus.com/ufc/youtube✔ Get the ESPN App: http://www.espn.com/espn/apps/espn✔ Subscribe to ESPN on YouTube: http://es.pn/SUBSCRIBEtoYOUTUBE✔ Subscribe to ESPN FC on YouTube: http://bit.ly/SUBSCRIBEtoESPNFC✔ Subscribe to NBA on ESPN on YouTube: http://bit.ly/SUBSCRIBEtoNBAonESPN✔ Watch ESPN on YouTube TV: http://es.pn/YouTubeTV
