C.S.
If the only thing he will try is hockey, why not help him develop that sport (if he wants to). I believe the rest will come.
My daughter hated football and was afraid to try at school. After hockey dry-land, the guys toss the football around and eventually, she gave it a try. She came home so proud because she was able to toss the ball around.
My daughter can be a bit shy, but we work with her and try not to do too much for her, so that she will do things on her own.