Americans like to use idioms and expressions on a daily basis and almost in nearly every conversation. Using sports idioms is a very natural way that we converse back and forth. Idioms can be categorized in many categories like colors, sports actions and many more.
In terms of sports, many Americans may not have any idea in which sport the idiom actually refers to, but they have a very good idea of the idiom in daily use. Sports idioms are used every where from schools to business offices, and if you want to be a natural speaker of the English language and want to speak like an American, it would behoove you to learn as many sports idioms as possible.