Overview

• Bosa left late in the first quarter after a third-and-9 rush and was ruled out, giving a thumbs-down as he headed to evaluation.
• Head coach Kyle Shanahan said sideline tests did not point to an ACL tear but emphasized further imaging is underway and noted concern over how Bosa feels.
• San Francisco won 16-15 on Eddy Piñeiro’s 35-yard kick as time expired to improve to 3-0.
• With Bosa sidelined and other starters out, the defense and rookies delivered key stops, including late plays from Fred Warner and nickelback Upton Stout.
• The injury compounds absences for George Kittle, Brock Purdy and Jauan Jennings, leaving near-term plans dependent on Bosa’s test results.