Maybe I shouldn't even give an answer since I am not a sport's enthusiast. However, I figure if someone who is not into sports knows these people, they must be good in their field.
In no particular order
Mohammad Ali
Joe Frazier
Mickey Mantle
Joe DiMaggio
Babe Ruth
Tiger Woods
Arnold Palmer
Joe Namath
Joe Green
Shac O'Neill
Michael Jordan
Wilt Chamberlain
Aren't all these people exceptional in their sport? My two cents.
TIS