It would be racist if I said his end zone celebrations were bad because he cannot dance. But I did not, so it's all good.
Racism: the belief that all members of each race possess characteristics or abilities specific to that race, especially so as to distinguish it as inferior or superior to another race or races.
Actually your post was textbook racism. If you had said a comment about a black player's ability due to the color of his skin it would have absolutely been the same thing. Just because somebody isn't a minority, doesn't make commentary about their abilities and skin color any less racist. I know you didn't mean any harm, but doesn't change facts.