Oh please. What a baseless generaltization
There are countless sports outside of the US that are hardly shining examples of fair play.
Fair play like what goes on in rugby? Or soccer games? Or cycling?
Statistics proved (and later actual evidence) the yukuza completely rigged sumo wrestling in Japan.
http://www.nytimes.com/2011/02/05/world/asia/05sumo.html
Just figured I'd pile on another country and sport while adding an interesting fact of the day.