Over the hundreds of years people have been competing in athletics, not only have there been teams who compete at high levels, but also certain players that when they match up make it the game to see. Manning vs. Brady, Bird vs. Johnson, Ovechkin vs. Crosby, plus a bunch of others. But which one on one rivalry is the best? Don't forget to add why. This isn't only for American sports either, everyone can add their two cents, soccer, rugby, hell if there is one, jai alai. I'll post mine in a little bit, hopefully after some people have put in their thoughts.