I have to admit that this is the one position I am definitely worried about. There is no one with quality and experience who can come in for Carra or Hyypia in any of the big games if needed.
Josemi and Traore I do not rate at all as centre backs. Josemi has got some praise on here recently, but imo he's looked no better at CB than he did at RB, and that's garbage. He goes to ground far too easily and isn't sound positionally. Traore is poor positionally also and despite his height he's very poor in the air. Both are ok cover as full-backs but I don't trust them in the centre.
Whitbread I do rate, I think he can become a good player. We might get away with throwing him in against some of the weaker sides, but he's not yet ready to be thrown on in the big games.
Barring any serious injury to Carra or Sami, we'll survive until January without too much damage done