What we really need to know is what starting caliber Center might get cut as a cap casualty before the season starts in case Cole/Boehm/Munyer can't handle it. There really aren't many FA centers available right now. G Alex Boone is still out there, but I don't know if he can slide over to C.
Maybe a teams like the Eagles that have both Jason Kelce (7.2m this year, 20.7m in the next 3 yrs) & Stefan Wisniewski (3.2m this year & 3.7m next yr) making a lot of money at C might cut one of them... Wisniewski has bounced around a lot in the last few years & we always seem to want the Cards to bring him in for a workout.