I would say Texas was stubborn to put Porter ahead of Warren. I mean he is doing really well in this pre-season thus far. He never got to realize his potential at Texas. He did well running the ball and catching the ball(He had really good hands for a running back). But, it was his blocking that hurt him and unfortunately for him, it is an important part of the game.
Gruden had this to say about Warren:
"He's a good back, isn't he? I mean he's rushed for almost 200 yards in two weeks. And I know he's not playing against the regulars but he's not playing with the regulars either. He's a big powerful back that's taken care of the ball, he's gotta get better without the football. That's what it's all about with him. We know he can run, we know he's powerful and fast and elusive, but he's gotta get a lot better without the football to be an NFL back." Gruden told reporters.