probably basketball or football
it involves balls
The most sport played is baseball, basketball, cheerleader's, football.
US Football by far is most popular in the states, followed by Basketball, and the Baseball.
Yes, it is the most popular sport in the US. But I would say that American Football, Baseball and Basketball are very close in popularity in the US. Football (soccer) is the most popular female sport in America, as well.
In the United States, no angling is not very popular. In the US, the most popular sports are football and basketball.
hot dog eating contests
Yes. However, baseball and basketball are very popular too.