BIGGEST UPSET IN US HISTORY? "Gold Cup: USA upset by Jamaica in semifinals" - Planet Futbol - SI.com

"...
It's the biggest upset loss ever by the U.S.
men's national team
I can't find one that's bigger than this. The U.S. had
only lost one time in its history to Jamaica, which was
ranked No. 76 in the FIFA world rankings ..."
http://www.si.com/planet-futbol/2015/07/22/usa-upset-jamaica-gold-cup-semifinals