49ers HC Kyle Shanahan admitted Friday that QB Brock Purdy (shoulder) is "up in the air" for Week 13. "I don't want to say there's long-term concern," Shanahan said. "We thought he just needed some rest. Really weren't concerned about him not being good this week, but when he started up Thursday, it surprised him, surprised us how it felt, so we had to shut him down." GM John Lynch said Friday morning that Purdy's Monday MRI didn't reveal anything concerning, but it doesn't seem like Purdy was close to being able to play against Green Bay on Sunday. We'll keep you updated on his status next week.