Charlotte's Chauffeur
SILVER
I think you made the right decision. Even though he will not be playing I would still suggest getting the waterproof sports cast. It just makes life easier.
My daughter broke her wrist at the end of December, and now we're in the same boat. She's been practicing/scrimmaging with a cast protector (https://www.thecastprotector.com/), which seems to be working great! However, I'm a little worried about the upcoming ref's discretionary determination next weekend in State Cup. I think I'll bring along bubble wrap and athletic tape to augment the padding in case of a difficult ref.
Regarding a waterproof cast, we asked for this, but the orthopaedic specialist recommended against this because she said it was not as snug as the regular cast lining, and wouldn't provide the same level of protection while playing sports. I'll bring a large roll of plastic wrap to State Cup to waterproof the cast in the event of rain.