Spurs: Wemby wants to win now. Castle is good but not close to Jaylen. Vassell is on a bad contract and the pick are needed to convince Boston. Many teams want Brown and assuming they fall short they have moves needed to make. Castle or Fox + a good amount more would be needed considered many teams would want Jaylen and would probably make more sense to give Castle considereing theyd have a better chance of winning.

Celtics: Castle could be a top 5-10 players and a good player to build off of.