The one thing I have seen with kids who play volleyball is the overhand spike throw from volleyball. It takes several weeks to get back to good overhand throwing mechanics once they are done with the VB season.
As for basketball. I have seen sooo many girls lose softball opportunities from torn ACL's I've lost count. I lost a player last year over the winter to a torn ACL. She was a speedy slapper who lost an entire season of recruiting exposure because of it.
Amen Sparky Guy. more than half my players are VB year round tournament players. so I do not have the repair window, so when they throw, they spike each other the ball. Stand tall, no follow through.
On top of that most also DaNcE, so they prance around the field, and run down fly balls on their tip toes.