Given he's 36 years old, with lots of mileage under him who was dependent on his athletic traits, it's not a surprise he is pretty much done. I don't think he is as washed as Biz, but fact is he has played in like 30 games in the last 3 seasons, dealing with injuries and such, I am not holding out hope he will be our saviour right away. Maybe he has to round himself into shape and as long as he can give us 5 minutes a game I am happy.
At this point, the Spurs should look for a PF who can set good picks, can shoot from outside, and can slot into a 3rd string center role if need be. I would love to have a Okongwu type but that is just a pipe dream. Hawks aren't giving him up, he's too expensive (sort of), and I doubt he wants to be on the Spurs where he'd be, at best, the 5th option.
Some players come to mind:
1) Brandon Clarke - Coming off an injury, he also can't shoot much and way too undersized to be a 3rd string center, but I like how he brings energy to the game, and he is somewhat of a rim protector.(3-4% BLK% is very good).
2) Beef Stew - Too good, too crazy for the role.
3) Mouhamed Gueye - Decent rim protector, got good size, a bit stiff and slow in movements, very good rebounder, not the greatest shooter, actually not the greatest anything on offence. Cheap contract, can possibly play backup 3rd string big, but not sure how much value he can bring as a PF.
4) Dylan Cardwell - Can't shoot AT ALL, strictly an inside scorer. Looks decent on screens, can protect the rim and rebounds VERY well. Would love to have him as a backup, but definitely not a solution for the PF spot.
5) Yves Missi - Seems to be getting less burn as the Pels are getting better. Can't shoot, sets decent screens, can protect the rim very well and rebounds quite well. Similar to Cardwell, but likely more expensive to get.
6) Eubanks - I wouldn't mind getting him back. Still can't shoot 3s, but his range seems to be at least up to mid-range/long 2s. OK rim protection, can rebound very well, set very good screens.