He has only gotten better this season , as he is leaving defenders grabbing for air every time he touches the ball .
Arizona Cardinals running back David Johnson took over for Chris Johnson in the middle of last season and took the league by storm .
David Johnson has only gotten better this season , as David Johnson is leaving defenders grabbing for air every time David Johnson touches the ball .
Arizona Cardinals running back David Johnson took over for Chris Johnson in the middle of last season and took the league by storm .