We're in a bind because the defenses can just walk up to the line of scrimmage and shut down the run game. I haven't looked at the Jeremy Johnson touchdown run, but I would imagine that it worked because LSU's defense was stacked in the box ready to shut down anything within five yards of the line of scrimmage. Once Johnson broke into the secondary, there was no one out there to tackle him because LSU wasn't respecting our pass game at all.
JSU did the same thing. They KNOW Johnson is either going to throw an awful interception or a bad pass. So they walk up their safeties, tell their linebackers to read run, and instruct their d-line to disrupt the line of scrimmage. Someone will be unblocked and can sprint to the runner and make the tackle.
So to have any chance to win, you can't give it to Barber or Roc or Jovon. Maybe Kerryon Johnson is shifty enough to think he can break one, but he'll get tackled for a loss or short gain most of the time. This puts the ball in Johnson's hands, and he sucks so bad that he can't be trusted to throw the ball forward.
This offense is doomed. DOOOOOMMMMED.