Bare-knuckle boxing proved its brutality with a horrific knockout on Saturday night.

Johnavan Vistante was on the receiving end of a savage right hook that left him sprawled out on the canvas in Biloxi, Mississippi. Following a dominant first round, Kaleb Harris landed the cruel blow nearly a minute into the second.

Vistante went for the uppercut but left himself open to an attack from his opponent. Harris, 25, took full advantage and unleashed a powerful fist straight into Vistante’s chops.

The referee called off the fight before Vistante even hit the floor and immediately called for medics to come to the fighter’s aid. The medical team appeared in no rush to treat the fighter despite the ref’s desperation to urge them in.

After his win at Bare Knuckle Fighting Championship 7, Harris’ record stands at 1-1.

“I’m on cloud nine right now. This is the 20th fight of my career and I told a few of my close friends I was ending it in the second round,” Harris said. “I knew in the first round when I dropped him a couple of times, I knew that with each punch it was getting easier.

“I am willing to fight anybody, anytime, anywhere whether it’s MMA or bare knuckle. So anybody that thinks they want to shut my mouth, they come and get it.”

But for Vistante, his time in bare-knuckle boxing has come to an end.

“It was a good run. Had my first professional fight at 16. I loved every minute of it. It’s took me too long to realize that the dream of my children and family are more important than mine alone,” he wrote on Twitter. “It’s been real guys. I love every single one of y’all who have supported me. Thank u.”