The problem is that when it's a problem with the mind, you can't put a timetable on recovering from it. My suspicion has been that it's depression related to his grandmother, that's totally just my thoughts. But some players never overcome a mental block. Roy Hibbert went from an All-Star caliber big man to a bum. There were rumors it had to do with Paul George sleeping with his wife/GF, but he was never the same. Not saying that will be Nurk, but it's difficult to put a timetable on this kind of thing. It's not like a knee injury.