I think the most interesting battle is at WR. Currently there are
12 WRs on the roster. Last year IIRC they carried 5. Cobb is a 2nd round draft choice and he's been getting positive press and looked good in the Browns game. So the Packers have Jennings, Nelson, Driver, Jones, Cobb who will make the team. Maybe they carry one more but you have to wonder why they would bring 12 WRs into camp when they're deep at that position already. On top of that, Finley is back, this Alex Green guy is supposed to be a terrific pass catching RB so the Packera aren't lacking for people to throw the ball to. Swain is a good special teams player so he might stick but I don't think he will. I don't think Driver is any danger either of not making the team as he needs something like 40 yards to become all time leading Packers receive in yardage.
Reading about Sherrod, apparently he's struggling a bit but he still might make it as a starter at LG and they're bringing Lang and Sherrod along at LT. Obviously they hope to get another year out of Clifton.