He has been injured some, but the fact he played through his shoulder injury for much of the year his rookie season shows toughness. The other thing is I think he is more than meh personally is he looks so much better than the other backs we have. If the line was the sole reason(not saying they aren’t a tremendous help) then Wilkins and Hines would do great as well. When they are both in they have had decent runs here and there, but in between there are negative runs or 1 yard gains. Mack rarely gets caught for a loss. He isn’t a top 5 RB probably, but somewhere in the top 10-12 I’d say easy.