Center of attention. The team's two top centers --10-year veteran Dan Koppen and Dan Connolly (fourth season with Patriots in 2011) -- are unrestricted free agents and it could come down to a choice of one or the other. Koppen missed almost all of 2011 with a foot injury sustained in the season opener, while the 29-year-old Connolly continues to develop and projects as more of a long-term option.