You are cherry picking a handfull of stats. Najee was injured and had to play in maybe the worst offense in the league at the time. Every defender could just look into the backfield and not even have to worry about back peddling. Couple that w/ the line just not playing well and you get what we saw, poor run game, poor pass game, and just terrible overall. When the steelers decided to commit after the bye Najee, the offense, and the line all looked way better. Its easy for an RB to come into a game and have a few splash plays and he is the next best thing. Najee has shown he can take a beating, Warren is still unknown if he can carry a full load. On the other side Dallas's offense was pretty stacked their defense has usually been the issue. Zeke had like 2-3 yrs of mediocre stats and pollard would often outrush him. Warren is definitely a great change of pace back and a very good backup, and overtime he may show to be better. With a healthy Najee, and improved line, and more weapons Najee has 0 excuse. I think he will need to prove himself in the first few games or he is going to be losing reps. I think Najee is a better all around every down back, but Warren certainly has some potential. Guess we will see in a few weeks