I Just Don't Understand......

Could you please help me understand one question that I have about two different football teams this season? The Dallas Cowboys and the Alabama Crimson Tide have confused and baffled me all season long. Why? Because both of these teams are fortunate enough to have not 1 but 2 great running backs, and they don't get the most out of these great players.

The Cowboys have Felix Jones and Marion Barber. Bama has Mark Ingram and Trent Richardson. For the life of me, I cannot figure out why neither of these teams will use both great running backs in the backfield together at the same time. The Cowboys NEVER do it. Bama only does it rarely. WHY?

If two great backs are in the backfield doesn't it put pressure on the defense because they cannot key on one or the other but must respect both? If two great backs are in the backfield, does it not increase the chances that your offense can score and score quickly? If you fake to a Marion Barber and give to a Felix Jones, aren't the chances greater that some defenders will be fooled than if you are faking to a hardly known running back? Shouldn't the middle of the field open up better for Marion Barber, if defenders think that Felix Jones may have the ball running with it to the outside? Doesn't a defense HAVE to give respect to Mark Ingram's fake, which should allow Trent Richardson larger holes and fewer defenders to beat? Vice versa, doesn't Mark Ingram have better lanes to run in, when the defense thinks that Trent Richardson may have the ball? In addition to all of this, shouldn't the play action passing game be even better when the defense must respect the play fake to not just one but two running backs?

Sgt. Football is only a "borderline" idiot who has never coached a game of football in his life. Every coach and employee for the Dallas Cowboys and the Alabama Crimson Tide know more football than Sgt. Football will ever know. But for crying out loud, someone please explain to Sgt. Football why a team with 2 great running backs cannot use them both at the same time? Or at least try to and see how it works out? I JUST DON'T UNDERSTAND!