The San Francisco 49ers will make some adjustments to their starting lineup this Sunday, reflecting changes we saw last week against the Seattle Seahawks. It is no surprise that Andrew Tiller will be starting at right guard, and Arik Armstead will be starting at right defensive end in the 49ers base 3-4 defense. NinerFans.com writer Ryan Sakamoto spoke with the players on Wednesday and got that confirmation.
Tiller played every snap this past weekend against Seattle, but for some reason was not listed as the new starter at right guard. It seems like it will be formalized to whatever extent this Sunday.