The NFL and College Football are really popular sports watched in the USA. Football is the most popular spectator sport in the US.
Football
Soccer.
The second most popular sport would be baseball. Although it is second for most popular SEEN, it is first for the most PLAYED sport.
Australia has never had an Olympic champion like the US has.
It's the main sport of every nation except the US, Canada and Australia.
American Football.
baseball
American Football.
Baseball
basketball
Yes, it is!!