Brock Purdy was efficient in completing 9 of 12 passes for 96 yards but also threw a red-zone interception as the San Francisco 49ers concluded their preseason with a 24-24 tie Friday night against the Las Vegas Raiders. Daniel Carlsons 43-yard field goal with 16 seconds left pulled the Raiders even with the 49ers. Joshua Dobbs 10-yard touchdown pass to Jacob Cowing late in the third quarter put the 49ers ahead 24-21.
