Greg Hardy made one hell of an impression on Dana White -- knocking out his opponent 55 seconds into his UFC Contender Series fight.
Greg Hardy just knocked the living hell out of this dude in his first fight pic.twitter.com/tpfnlzTV3u
— Barstool Sports (@barstoolsports) June 13, 2018
Hardy was matched up against former NFL lineman Austen Lane Tuesday night -- and the winner gets an opportunity to earn a UFC contract ... if White feels like the fighter has earned.