Aside from the tragedies (Griffith-Paret being the most brutal thing in the ring I've seen), this may top the list.
Griffith-Paret is the worst i have seen, u can hear the thumps loud and clear!horrid stuff..... a man beaten to death!ref should be shot.....
That video was terrible. Im glad the sport is better today. In terms of TKO's, fighters not having to die in the ring.
The punches Williams was hitting Jack with were FAR more brutal than the ones Griffith was hitting Paret with, even at the very end. It was really the accumulation of so many unanswered shots on an unresponsive opponent rather than the sheer force of the numerous blows such as in the vid posted.
The most brutal Ive seen was Tommy Morrison refusing to go down and almost getting killed because of it. That was truely brutal. Don't remember if it was an TKO or KO. Think is may have been a KO.
He didn't refuse to go down, he had no control of his motor functions nor his brain at that point. The ropes held his unconscious body up.