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Greg Hardy had a rough night Friday. 

The former NFL defensive end turned boxer was brutally knocked out in the 17th round of Team Combat League.

Alexander Flores delivered the blow at Hardy's expense. 

The end of Hardy's football career was mired in controversy. He was accused of domestic violence and was arrested for cocaine possession. He last played football during the 2015 season for the Dallas Cowboys.

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Greg Hardy at the UFC 272 ceremonial weigh-in

Greg Hardy poses on the scale during the UFC 272 ceremonial weigh-in at UFC T-Mobile Arena March 4, 2022, in Las Vegas. (Jeff Bottari/Zuffa LLC)

Since then, Hardy has pursued a career in boxing.

He signed a UFC contract in 2018, which has since expired.

EX-NFL PLAYER GREG HARDY KNOCKED OUT COLD IN BARE KNUCKLE FIGHT DEBUT

The 34-year-old's Bare Knuckle Fighting Championship debut in February ended with a brutal knockout.

"Win some you lose some," Hardy wrote on Instagram following this week's knockout. "I got sloppy looking for a knockout.

"Forgot to fight my fight and paid the price against a good boxer. More to learn."

Greg Hardy during a weigh-in

Greg Hardy poses on the scale during the UFC 272 official weigh-in at UFC APEX March 4, 2022, in Las Vegas. (Chris Unger/Zuffa LLC)

Hardy fell to the ground during the early portion of the 17th round after his opponent's left hand appeared to make contact with the former All-Pro defender.

At one point, Hardy attempted to gain the advantage, but he was backed up against the ropes. Shortly after Flores had Hardy on the ropes he landed the knockout punch.

Greg Hardy encourages Panthers fans to cheer

Greg Hardy of the Carolina Panthers urges fans to cheer against the New York Jets during a game at Bank of America Stadium Dec. 15, 2013, in Charlotte, N.C.   (Grant Halverson/Getty Images)

Hardy was a sixth-round draft pick in 2010 and spent five seasons with the Carolina Panthers.

He was named to the Pro Bowl in 2013 after he racked up 15 sacks. Several disturbing pictures were released following Hardy's alleged assault of his ex-girlfriend in 2014.

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Hardy later filed an appeal, and the charges were dismissed because the accuser did not show up for a hearing. Hardy finished his NFL career with 40 sacks.