Though former UFC lightweight champ Sean Sherk hadn’t fought in a few years, the seasoned veteran finally called it quits this week after learning he’d need hip replacement surgery stemming from his twelve-year run as a wrestler and professional fighter. As fans undoubtedly remember, the 40-year old Sherk had a number of memorable performances inside the Octagon including some major wins. Take a walk down memory lane with this retrospective on some of Sherk’s biggest successes in the infamous eight-sided cage… (Photos by USA Today Sports Images)