He may be using a scooter but look how he's sitting. Ankles below his knees instead of extended is a good sign imo. Ankle bent upward like that without pain is very good. I don't think he'd be sitting like that if his ankle was really ****ed up.
Feel bad for the kid. I'm sure he knows what he means to the team. Hate missing any games but it's gotta hurt to miss any tourney madness. Hope he heals quick,