Steve, you know I'm a fan of yours, but I simply disagree here. A lot.
It ain't a NA vs. Europe question. It's a question, where football (or soccer if you prefer) is the most popular sport in every single continent but NA.
Because of this, football players should get extra points in such a list (if it weren't an American list, that is).
As for baseball, hockey, NFL-style football. Sure - but what about croos country skiing, alpine skiing, handball, badminton, table tennis, Australian football etc., etc., etc., etc.
Fact of the matter is that many of these NA sports are taken seriously by a select no. of countries. Now because one of those countries, for the big NA sports, happens to be the richest country in the world with the biggest cultural industry and ability to spread globally, that levels the playing field a bit.
But I still don't see why you would pick baseball and hockey players over say badminton and handball players if we're looking at how global the sports are.
Edit: Basically this, which I see you agree with ;-)