Made my morning now I just need to clean the coffee off the keyboard.
On a serious note the big question is what exactly is one measuring, which wouldn't be as easy as measuring Mr. John Holmes qualifications. Sports and athletics cover a wide range of activity. I think if sportswriters or sports historians would actually sit down to answer this question (which I don't think they would) the greatest white athlete would probably be someone from over eighty years ago, and quite likely not american.
Grandpa fought Fascists in WWII, Dad fought Communists in Vietnam. - American is meant for the middle.
