How much did Indy's O-line contribute to Edge's success in Indy. With a weak O-line in Arizona last season, Edge was just an average back.
A great O-line can make an average back have a good season. A poor, porous O-line can make an average back look inept.
Turner himself was a 5th round pick. Decent backfield talent can be found in the middle rounds of the draft, assuming exceptional scouting.