AAU

Amateur Athletics Union. Basically an extra league for most sports such as basketball, baseball, and other sports. Usually for really good players that are trying to get looked at by scouts. AAU teams enter different tournaments for their sport and at least for basketball, enter showcases.

AAU stands for Amateur Athletics Union. AAU is mainly popular in sports like basketball, however it is also in other sports as well. It is an extra league during the offseason for competitive players or talented players looking for scouts to offer them a college offer or get overlooked. AAU teams are frequent in every city, and to join an AAU team it usually costs money to be on the team as its a "travel" team, however, there's aid if you're good. It's basically a tournament, as you'll notice in most AAU settings there's many courts yet with little audience/many scouts.