49ers quarterback Brock Purdy has cleared concussion protocol and is in line to start for San Francisco on Sunday against the Bengals.
Purdy played through the entirety of last week's game against the Vikings on Monday night, but started showing concussion symptoms on the 49ers' flight home, and was on the team's injury list all week.
Purdy's availability means that backup quarterback Sam Darnold will likely have to wait a bit longer before he sees his first game action for San Francisco.
