I heard he's academically ineligible but not from a good source.
Update:
From Hedges to Hardwood:
In particular, those three to four that gave two members of our football team F's on their grade report. One of these fine specimens of academic achievement is reportedly starting RB Caleb King. Of course this is third/fourth hand info from us and was originally reported by Anthony Dasher of UGASports.com (We're one of those bloggers who does, in fact, give credit to sources). The other player has yet to be named, but if I had to venture a guess, I'd say it's probably a guy on defense who doesn't play much.
Before my head explodes, I'd like to state again that I don't like to call attention to players for things out of their control, which includes football ability, etc. Just as you were expecting, here comes the "but". To Caleb and whomever else couldn't keep their academic house in order, this is inexcusable behavior. Sub-par performance on the field is one thing, but a general distaste for abiding by the rules and being a good STUDENT athlete are a real cause for concern. Unfortunately, conduct like this is becoming a trend in Athens.