49ers cornerback says there’s ‘no drop-off’ between Brock Purdy, Sam Darnold; Shanahan confident in both QBs | CBS Sports Headlines 49ers cornerback says there’s ‘no drop-off’ between Brock Purdy, Sam Darnold; Shanahan confident in both QBs Darnold could start in Week 8 if Purdy is sidelined due to a concussion … Continue reading 49ers cornerback says there’s ‘no drop-off’ between Brock Purdy, Sam Darnold; Shanahan confident in both QBs