Wow if I saw this snake at a store somewhere I would bet money on it that it was farm hatched and not captive bred. I have 4 farm hatched baby balls and none of them look as bad as that, not even the one I have had to resort to force feeding. I find it hard to believe that it has been fed more than once or twice or even at all. This late in the season he should have a way better start than that.

And sorry if that is bad news, but it is my honest opinion. I would make sure he has plenty of water available for drinking and soaking, maybe raise his humidity a bit, perhaps offer him a live crawler (my balls all regurgitated their hoppers) just to see if he will eat this soon after moving to a new home, but if he doesn't, I would totally leave him alone for a few days, don't take him out at all, then offer a crawler again.