49ers GM Lynch says Purdy status ‘tenuous’ after MRI on shoulder injury

SANTA CLARA — An MRI exam on Brock Purdy’s throwing shoulder has the 49ers “feeling good,” but his status is still “tenuous” to play in Sunday’s game at Green Bay, according to general manager John Lynch.

Injured at an undetermined point in Sunday’s 20-17 loss to the Seattle Seahawks, Purdy did not throw at Wednesday’s practice and then did so only briefly Thursday before retreating to rehab his shoulder “per the plan,” Lynch said on KNBR 680-AM.

If Purdy misses his first start due to injury since seizing the job nearly two years ago, Brandon Allen will open for the 49ers (5-5) against the Packers (7-3) at Lambeau Field, with Josh Dobbs the No. 2 quarterback, Lynch confirmed.

“We’ve done that (MRI) and feel good about where it’s at from that standpoint. But you still have to go out and be able to operate,” Lynch said. “We’re kind of figuring all that out. Brock is going to show up today, we’ll see where he can go as far as practice and we’ll make some decisions accordingly.”

Coach Kyle Shanahan will address the media with the official status report after today’s practice before the 49ers fly to Wisconsin for the first of two consecutive road games, with a trip to Buffalo awaiting next weekend.

Purdy’s usual press conference after Thursday’s practice was postponed to today, with no assurance whether he or Allen would be speaking to the media as the projected starting quarterback.

How and when Purdy got hurt remains a mystery, Lynch said.

“It was somewhere during that Seattle game and I’m not sure Brock knows,” Lynch added. “He fought through it through the course of the game. I did see him during the course of the game, anytime there was a pause, he kept throwing. At that point, you’re feeling something but he was so focused on trying to win.

“We had a plan to try to quiet it down,” Lynch said. “Wednesday, didn’t do any throwing. Thursday, started to do something throwing then went inside and did some rehab, per the plan. We’ll see where he’s at today. Hopefully he makes progress and we can have a shot at this weekend.

“We’ll see. It is tenuous.”

Also circumspect are the availabilities of defensive end Nick Bosa (obliques, hips) and left tackle Trent Williams (ankle).