Tennessee quarterbacks coach Pat O'Hara called six-year journeyman Joshua Dobbs hours after a loss on Christmas Eve, asking him to come to the team headquarters on Christmas Day.Though he had signed just four days earlier, the Titans decided to turn the offense over to Dobbs and coach Mike Vrabel insisted the game plan would remain the same.Well, it really didn't. It couldn't.Dobbs was just one of many quarterbacks thrown into the heat of battle due to a rash of injuries at the league's premier position, making devising a game plan even more challenging. Those offensive schemes are tailored around the projected starter with opponents plotting to derail those plans.