Racing PositionsWhy Christian McCaffrey will again be Panthers' workhorse -- immediately2MDavid NewtonCam Newton's injury puts spotlight on Panthers' struggling backup QBs1YDavid NewtonBroncos' struggles at quarterback have mirrored OL issues2YJeff LegwoldSource: Center Paradis to sign with Panthers2YDavid NewtonCarolina Panthers' 2019 free-agent signings: Paradis will replace Kalil at center2YDavid NewtonBuffalo Bills' 2019 free-agent signings: John Brown a deep threat for QB Allen2YMike RodakPanthers' free-agent targets could center on a center2YDavid NewtonJets' offseason mission: Protect QB Sam Darnold2YRich CiminiBroncos take plenty of needs with them to NFL scouting combine2YJeff LegwoldBroncos have plenty of needs to fill in free agency2YJeff Legwold