Although, it wouldn't allow me, since I'm guessing it would have messed up your IL. I signed him to the 76ers so he'll be on the rosters next year.
which was exactly my intention.
btw, have you ever figured out why some teams wouldn't accept cuts or FA signings anymore towards the end of the playoffs? It has nothing to do with cap sapce or roster spots since it happens for random teams. The only way to still do it is to edit a player and assign him to a team. strange behaviour and i haven't found a reason yet.