49ers quarterback Brock Purdy is currently listed as 'day-to-day' due to back soreness, according to head coach Kyle Shanahan. An MRI revealed no significant issues, and the team remains optimistic about his ability to practice later this week. This situation is not expected to affect Purdy's performance in Week 4, but his status will be monitored closely.

• Brock Purdy's back soreness is not expected to impact his Week 4 performance.
• The MRI results were clean, which is a positive sign for the 49ers.