Seems to me thing about comparing a sportsman vs. an artist/entertainer in terms of influence is in the one you're participating in a game with pretty rigidly defined rules and just trying to maximize your effectiveness within that framework, while in the other you can kind of just make shit up. It's as though a ballplayer was able to introduce new rules or even an entirely new sport. While there have been some examples of that such as Shaquille O'Neal inventing Shaq-Fu or Bill Laimbeer inventing Combat Basketball, they seem to be few and far between.