Purdy finished last week’s game against the Seattle Seahawks, but he picked up a shoulder injury along the way that kept him out of practice this week. Bosa did leave that loss to the Seahawks due to a hip and oblique injury, and now that ailment is going to cost him another game.

The 49ers have already announced that former Denver Broncos and Cincinnati Bengals backup Brandon Allen is going to be the starter on Sunday against the Packers. The backup will likely be veteran Josh Dobbs, who has made the rounds in the NFL and was the starter with the Minnesota Vikings for an extended period of time last season after the injury to Kirk Cousins.

While Dobbs isn’t getting the start on Sunday, Shanahan spoke about how valuable he has been for the team this season on Friday.

“He’s been awesome,” Shanahan said. “[Dobbs and Allen] split the scout team reps so they both get equal reps over there throughout the year and really loved having him in the room. And he’s been great on the field too.”

49ers must win to keep pace in NFC West

While the 49ers have struggled with injuries up and down the roster and inconsistent play this season, the rest of the NFC West has taken full advantage of the opening. The Seahawks, the Los Angeles Rams and the Arizona Cardinals have all been able to survive some adversity of their own and keep pace in the division race, making the NFC West one of the most crowded and unpredictable divisions in football.