Good for him.
I do believe that he has the size, mobility and a certain skill set to be at best, a serviceable backup in the NBA. Part of his problem is his feel for the game, as he's really just new to this (IIRC when we had him, he only had 6 years of basketball experience). If he says that his knowledge for the game has grown, and he now knows how and when to pick his spots, I think he's going to be a solid 10-12 minute Center at the very least.
Good luck, Fab. I hope he does come back in the NBA at some point.