Boxer Patrick Day dies 4 days after knockout

What they're saying: Conwell posted an open letter to Day via Instagram on Monday, saying he never meant to hurt him and that he was considering quitting boxing.

"I never meant for this to happen to you. All I ever wanted to do was win. If I could take it all back I would ... I replay the fight over and over in my head thinking what if this never happened and why did it happen to you."

Gut-wrenching: "It was a running issue between Pat and I, how he came from a very educated, successful family and his mother didn't want him to box," said promoter Lou DiBella, per The Athletic (subscription). "I've known Pat since he was a kid, and she never attended one of his fights."