The only sports I really follow are bowling or horseracing, and for the latter I'm not sure if I should consider the horses, their jockeys, or both. But as far as bowling is concerned, my favorite three players are Walter Ray Williams, Jr., Chris Barnes, and Norm Duke.
Otherwise, the only other competitive type games I follow are card games- poker or Magic: The Gathering! I suppose I could talk about my favorite players there, if someone really wants me to...