There are three reasons not to have a guy on the field: 1. He's hurt. 2. He needs a breather. 3. There's somebody better for the job. The question I'm raising in this thread is -- whatever might happen for Reasons #1 or #2, who never (or almost never) sits for Reason #3? On offense I make it: QB (Brady) and starting OL are always in. Gronk-style TE fits into every package. If you have tall WR who demands a double-cover, he fits into every package (Moss). That's about it. On defense I have: Starting safeties fit into almost every package, although the strong-safety type might line up more as a strong-side LB in some cases (responsible for covering the TE should the need arise). Best CB fits into almost every package, although perhaps he or the free-safety type sits in some extreme jumbo (2 DB) packages. A Seymour or young-Wilfork type of starting DL (i.e., one with pass-rushing burst) fits into every package. Ty Warren or prime Wilfork is less ideal in nickel/dime packages (but have been known to be in anyway). (Quantity 1 in a few dime packages, 2+ otherwise) Prototypical Patriots OLBs fit in every type of situation (Quantity 2+). ILB with good range and adequate coverage skills (Mayo) fits in every situation. (Quantity 1). And that's about it. Thoughts?