[Fly Like a Duck]

Lafayette- Tyson Gay (I don't think he qualified for the Olympics this year, but he is a Three-time Olympian, and once--I believe--was the "Fastest Man in the World").

Louisville Central- "The Greatest" himself.

St. X- Mike Silliman (basketball, won a Gold Medal) <---can't lie on this one, I had to look it up. I just had a hunch that X had an Olympian(s) (and, guessed it was in swimming/diving).