You know a performance is incredible when people refer to it in capital letters. That's how you know Michael Jordan's "Flu Game," which occurred 25 years ago on this date, is the stuff of legends. Jordan's efforts while sick against the Utah Jazz is one of the most memorable moments of his career -- and considering this is MJ we're talking about, that's saying something. The Flu Game's anniversary reminded us of a number of other amazing performances by athletes who had every excuse to sit out -- but delivered greatness instead.