well, the USA is hampered by having 4 or 5 major sports already...a couple of which were sort of invented here. It doesn't leave much TV space for soccer/football....especially when, as Harvey says, our sports are better designed to allow commercial breaks..*grin*still, there ARE lots of soccer teams and it is a sport which can be played if you are under 250 lbs and under 6'6" tall...so, gradually, it is catching on...
(remember...we don't do 'serious' bike racing either, but we have had a couple of champions)
now if some of those 500 cable TV channels could be devoted to the sport....................