Center of Attention

Here is a good article from today's Post-Gazette about the work that the Steelers are doing in free agency. Of particular note is that deals are imminent to restructure the contracts of both centers on the team, Jeff Hartings and Chukky Okobi. The question that this fact raises is this one: are the Steelers not treating center as a need position right now? Do they have faith in Chukky?