Former NFL defensive end Greg Hardy has taken up a new career as a pro fighter, but his bare-knuckle boxing debut did not go well.

Hardy suffered a devastating knockout during a bout against Josh Watson in the Knucklemania 3 card on Friday in the second round.

With less than two minutes remaining in the round, the former Dallas Cowboys player failed to land a left-handed swing and in return, Watson hit Hardy with a powerful left hook. Watson hit Hardy again as he was falling to the ground.

The 34-year-old was still attempting to get up when the referee counted to 10. He ultimately needed assistance to sit up, as he was unable to do so under his own power.

The Carolina Panthers selected Hardy in the sixth round of 2010 draft. He went on to become a Pro Bowler in 2013. The following season, he was placed on the commissioner's exempt list due to a domestic violence charge.