He will be on the roster next year even if he would of had a average summer league. I don' think they have any confidence in DeMar Johnson(if they choose to resign him this season) and Anthony Carter is a Point Guard
They are in a position that they are 11 million over the cap and cannot afford to sign another free agent.
Wafer is a very good shooter and scorer, but does little else well. He is small in frame for a SG, has trouble with bigger players, and is simply not very good defensively. But as a 12th or 13th man, he's a good guy to have around, and you know he'll work his ass off to try and get his opportunities.