Boxer Patrick Day died Wednesday from injuries suffered in a fight over the weekend, his manager said.

Day was taken out of the ring on a stretcher and rushed to the hospital after being knocked out by Charles Conwell in the 10th round of their Saturday bout in Chicago. The 27-year-old Long Island native went into a coma. It is unclear if the coma was medically induced

Conwell, 21, revealed Tuesday that the outcome of the match has left him devastated and that he considered quitting the sport.

“I never meant for this to happen to you,” he wrote in an Instagram letter to Day. “All I ever wanted to do was win. If I could take it all back I would no one deserves for this to happen to them. I replay the fight over and over in my head thinking what if this never happened and why did it happen to you.

“I can’t stop thinking about it myself I prayed for you so many times and shedded so many tears because I couldn’t even imagine how my family and friends would feel. I see you everywhere I go and all I hear is wonderful things about you. I thought about quitting boxing but I know that’s not what you would want I know that you were a fighter at heart so I decided not to but to fight and win a world title because that’s what you wanted and that’s what I want so I’ll use you as motivation every day and make sure I always leave it all in the ring every time.”