WBC heavyweight champion Deontay Wilder is a much tougher man than most.
Wilder improved to 37-0 (36 KOs) with a TKO victory over Chris Arreola, who retired after the eighth round from an accumulation of damage. Wilder put Arreola down in the fourth round with a flurry of punches, and nearly ended the fight before Arreola was saved by the bell while on the ropes taking serious damage.
In that flurry, Wilder appeared to injure his right hand and arm, as he threw almost exclusively left jabs and hooks for the final four rounds of the fight before it was stopped.