http://www.dailymotion.com/video/x3n1z6l_dominick-cruz-leaving-injured-after-winning-the-ufc-belt-against-tj-dillashaw_sport

Any sport that involves physical contact could lead to injuries.   When you’re in combat sports those previous injuries could act up, or the pain may be a result of your opponent kicking your rehabilitated knees with regularity throughout a fight.

Check out Cruz as he walks/limps his way out the arena floor.

Enjoy the video.