If the Nets want to get off Simmons contract this could work for both teams. Clears a lot of salary for the Nets, don’t have to give up too much to get off him either and Graham may help at the end of their rotation.
For the Spurs, it’s a value play. I back the combination of Pop, Brett Brown & the Spurs culture to get the best out of Simmons, and if they can’t, they cut him loose.