It is astonishing is it not the degree of myopia demostrated by so many of the American posters to this thread , are you not embarrassed by your lack of familiarity with anything not American in origin or purvue ? Whilst I agree that Tiger Woods is a global Phenomenon and that no doubt Muhamed Ali must be recognised as possibly the best known sportman of all time I find your assertion of the likes of Babe Ruth , Michael Jordan and Lance Armstrong to laughable in the face of your ignorance regarding any sports not mainstream in America.
I do not dispute that each of those men are truely great sportsmen and quite possibly unique in their achievements but at least I can consider them in conjuction with other great sportsman from sports far more popular than anything played predominatley in the United States. I feel fairly certain that in overall global terms you will find that Pele , George Best and David Beckham are all better known that Ruth , Armstrong or Jordan .