For the Celtics, they manage to get their third star for just a young player with potential, a first, and Horford. For the Spurs, they manage to get a descent return for DeRozan instead of letting him walk in free agency. They get Nesmith who could fit nicely with their young core, a first and take on Horford’s contract to make the money work but he could be a nice veteran or another trade piece for a contender looking for a center. They may also just buy him out. Also, this should still leave enough money to sign Beal because you would not be resigning Fournier and Thompson is only has one year on his deal so you may get to a point where you can have DeRozan Brown, Tatum and Beal