You don't even know it until the fight is over. When a quitter like Pettis get injured, they give out a "subtle" sign that they are injured so they can make excuses later while trying to coast to a decision loss. Faber broke both hands and started swinging with elbows. Conor hurt his knees, and went for the takedown. He hurt his legs when kicking Nate in the second fight and simply stopped kicking, but never turned it or shake it and kept a stoic face and went with punches. Pettis will never ever be champ again. He won the lottery to even get a title at any point in his career.