I just don't see any room for him on this roster as currently constituted.
We have these guaranteed on the roster:
KG,PP,Ray, Rondo, Perk, Scal, BBD, Powe, Pruitt, and Giddens - That's 10
We will likely only keep 2-3 others (Posey, House, and possibly one other free agent off last years team) Maybe this Walker kid.
That leaves us another spot minimum. Considering we realistically will only sign 1-2 of the free agents from last year (Hopefully Posey and House) that leaves us 2 spots. One for a big. One for a backup PG. I would for sure rather have a nice backup PG and a nice backup big, but it would sure be nice to have this kid around in case Walker doesn't look better, or we only sign 1 of the FA's. He would be very cheap and we know more about what we have in him than most players. I am thinking we will trade either BBD or Powe in the offseason as well which will change the look of things.
Once again. He might not make the team, but he looks to be improving and has a great NBA body for a big 3 spot type backup. Then when Scal is gone next year (surely will be traded away to a team wanting an expiring contract) we may have something for his slot on the roster. Just cheap talent with upside...