If there is one area on the Patriots’ roster that would be cause for concern for the personnel and coaching staff, it’s hard to think anything would top defensive tackle behind Vince Wilfork and Tommy Kelly. It has looked like a pretty big drop-off after the top two and that’s why I wouldn’t be surprised if the club signs/claims a big veteran defensive tackle as teams around the NFL trim rosters later this month. Those types of players, as Bill Belichick has noted in the past, can be some of the toughest to find. This is where we’re reminded of how the Patriots were planning on first-year player Armond Armstead being a big part of the mix before he landed on the non-football illness list after undergoing surgery for an infection.