Well, one more to go assuming they are going to fill all 15 possible roster spots at the beginning of the season. Danny often likes to go with 14, leaving a spot available for future flexibility. Plus, with the Luxury Tax, filling that spot now is twice as expensive.
Since league rules dictate a team must only have 13, I see it more than likely the C's won't carry more than 14, at least at first. Maybe it won't be these 14 if a deal gets done involving Scal, TA, Giddens or Walker, but they probably won't fill all 15 available spots before the season.