Week 1 was a fluke, probably the flukiest long TD run I've ever seen right at the end of the game to make his numbers look good.
Week 2 though, he looked good running against a very good defense. Pittman was not much of a factor at all in either game really, Caddy definitely looks like he's going to get the ball a lot. Ok, so he never carried the load in college and the big question is whether or not he can handle 25 carries a game for 16+ games in the NFL. Bleh, I've never bought into that, not going to now, he'll be fine.
ONLY thing that worries me a little about Caddy is that Alstott has gotten a number of goalline carries, but I'm not sure how long that'll last as Caddy is pretty good near the stripe himself.
I would hold him.