For the youth leagues it really isn't.  My entire family participated in various athletics at the college level, so when cousins/nieces/nephews start coming of age they are drilled hard.  When it was time to take my niece and nephew out for basketball leagues I had the honor. After three games they moved my niece to the boys league and two games after that they moved her up an age bracket.  My nephew was moved up age brackets mid game.  All due to the fact that they were the only ones in shape enough to actually run the floor and it was "demoralizing" for the other kids. 10, 11, & 13 year old couldn't run up and down the floor twice.   So no, there are no such thing as tryouts anymore.