SANTA CLARA -- The 49ers haven’t done much in free agency. In fact, they haven't added a single player to a defense that finished 29th overall last season. When they assemble for the start of the offseason program next week, the roster will be nearly identical to how it looked at the end of last season, at least from a personnel perspective. The only difference -- albeit a big one -- is the coaching staff. Here’s a stab at a rough depth chart for the beginning of the offseason.
Defense
Defensive end: Quinton Dial, Arik Armstead, Glenn Dorsey, Kaleb Ramsey
Notes: Armstead improved over the course of his rookie season and the 49ers will look for him to expand -- perhaps drastically -- on his 375 snaps from last season.