Coach Ron Rivera confirmed Tuesday that he plans to keep Webb on the Panthers' 53-man roster as the team's third quarterback, the Associated Press reports. With Cam Newton's health a bit uncertain after he suffered a hairline fracture to his ribs in last Friday's preseason game, the Panthers will enter the regular season with two backups on hand as insurance. With Derek Anderson locked in as the Panthers' No. 2 quarterback, Webb could be let go by the team once Newton is deemed completely healthy.