American boxer Patrick Day died here on Wednesday as a result of the traumatic brain injury he suffered during his fight on Saturday, when he was knocked out by Charles Conwell in the 10th round.

Day, 27, had been in a coma for four days following his defeat and, despite having emergency brain surgery, doctors were unable to save the junior middleweight.

Day’s death comes after 23-year-old Argentine super lightweight Hugo Santillan died in July from injuries suffered in the ring and 28-year-old Russian Maxim Dadashev passed away two days earlier from brain injuries during his fight.