Brock Purdy Has Sore Back

49ers QB Brock Purdy is "day-to-day" with back soreness, HC Kyle Shanahan said Monday. Purdy had an MRI that came back clean, per Shahanan, and the team is hopeful that he'll be able to practice on Wednesday. It doesn't sound like this is something that'll impact Purdy's Week 4 outlook, but we'll keep an eye on him this week.