This is turning into an interesting situation.
Spriggs and Murphy have each had their moments, both good and bad; but overall seem to have justified their selections, so far. Obviously Spriggs will make the final roster, and I doubt they will risk exposing Murphy to waivers in an attempt to get him to the PS. Tackles are too valuable.
Lane Taylor received a good contract, and went into camp as a virtual lock for a backup guard spot. He has not played well in the two games, and reports are that he has not looked good in practices either.
Rotheram was given a big boost in salary toward the end of last year to keep him in GB, so seemed to have somewhat of an inside track to a roster spot, or PS, as well. He, too has not played well in practices, and is now injured to boot.
Josh Walker, who seemed to be a long shot as no higher than the 5th guard or 5th tackle has looked better than either Taylor or Rotheram, but also has been not awful at tackle as well. Versatility is important in the backup OL spots.
Barclay continues to show his versatility, and by all accounts seems to be closer to his pre-injury performance than to his performance last year.
Linsley remains in limbo, and could be looking at PUP to start the season if he doesn't get on the field soon. With Rotheram out and not having played well before that, Barclay could be the #2 center at the start of the year.
The opening 53 man roster could include both Walker and Barclay, who seemed like very long shots going into camp, and neither Linsley nor Taylor, who seemed to be sure bets, or Rotheram who seemed to have a chance as a g/c.