Have made sure he did the paperwork. The athletic admin over bball should have made sure he did they paperwork.
Sure, he probably told everyone he was 99.9% sure he wasn't coming back, but do the paperwork just in case that 0.01% happens.
His agent wasn't looking out for him, just the money he could eat off of him. The previous staff wasn't looking out for him, they were in their way out the door. The athletic admin wasn't looking out for him, he wasn't part of the program anymore.
Lots of people weren't looking out for him like they should have.