It’s not like he was throwing at game speed, but the sight of Brock Purdy throwing the ball during warmups Friday was encouraging before the 49ers left on a trip to Buffalo. It was the first time Purdy had thrown in the presence of reporters since he was listed with a sore shoulder coming out of a Nov.

Brock Purdy remained limited in a Thanksgiving Day practice, keeping his status in doubt for the 49ers’ game Sunday at Buffalo. Purdy missed last Sunday’s 38-10 loss at Green Bay because of a shoulder injury that’s impaired his throwing ability since the previous game’s loss to Seattle.