Overview

• The injury occurred in the first quarter against Arizona after Bosa had recorded two tackles.
• The 49ers designated Bosa questionable to return with a knee injury, according to broadcast and reporter updates.
• Bosa walked off the field, then went down on the sideline before entering the blue medical tent, as shown in widely shared video.
• He later exited the tent without putting his helmet back on and did light stretching and high knees with training staff, per on-site reports.
• The exact diagnosis and timetable remain unknown, and outlets say additional information will be provided when available.