49ers head coach Kyle Shanahan provided an update on quarterback Brock Purdy's shoulder injury, indicating that his availability for Week 13 is uncertain. Although an MRI did not reveal any long-term concerns, Purdy's condition did not improve as expected, leading to his shutdown during practice. The team will continue to monitor his status leading up to the game against Green Bay.

• Brock Purdy's Week 13 status is uncertain due to a shoulder injury.
• The MRI results were not concerning, but his practice performance was unexpected.