Hmm, any chance he had that new fad plasma/platelet (can't even remember what it's called) enrichment surgery? I'm still not convinced it's anything other than a placebo, but a lot of nba players seem to swear by it. I'd kind of feel a bit more hopeful if tha'ts what he had.
If you look at his twitter timeline, the surgery can't have been a debridement again as he was out wandering around Israel most of July, and was working out while there.