Brock Purdy in concussion protocol

Niners QB Brock Purdy has entered the league concussion protocol. The Athletic's Matt Barrows reports that Purdy began showing symptoms on the flight back from the Monday night loss at Minnesota. The timing obviously puts Purdy's status in question for Sunday's game against the Bengals. Sam Darnold would be in line to start if Purdy can't go. We'll track the situation throughout the week.