Most of you know this already, but for those in need of a refresher, football is called soccer here in North America. A large reason it continues to be differentiated is the National Football League, which the rest of the planet calls American Football. The NFL is the most popular sport in the US in terms of fans, TV viewership and betting. It’s so big that if you started calling soccer by the name football — like everybody else in the world — people here in the US would be confused.