The world of combat sports lost a good one yesterday with the passing of "Smokin" Joe Frazier, who died after a short struggle with liver cancer. An Olympic gold medal winner with a bruiser's style, unreal work ethic and a left hook from hell, Frazier's trilogy of battles and on-again, off-again rivalry with Muhammad Ali, as well as bouts with Buster Mathis, George Chuvalo, George Foreman and more, is the stuff of legendary careers. Thanks for the inspiration, Joe. To brush up on your boxing history and learn more about Joe Frazier, check out this ESPN documentary: