Game 6 of the NBA Finals was a classic, and both the Heat and the Spurs are banged up. Dwyane Wade is playing through a bum knee, and Tony Parker's hamstring injury has limited his trademark quickness at times, but was able to hit a monster three last night. Both are digging deep and gutting it out this series, but how does that stack up against Willis Reed taking the floor for Game 7 of the 1970 Finals with a torn leg muscle? Or Muhammad Ali boxing with a broken jaw? Wade and Parker may have nagging leg injuries, but these 25 athletes demonstrated tremendous toughness and valor to play through extreme injuries to try and help their team win. Check out the 25 Gutsiest Performances In Sports History.