"He understands when a play gets called -- the play from A to Z," Pettine said. "He understands it well, the formation, who needs to be where, the timing of any particular motion, the spacing of the wide receivers and then what the read is. If the route is built to where we have a blitz-beater on one side and a zone-beater on the other, he can recognize a defense." He’ll need to bring all of this to the party on Sunday against the unbeaten Broncos whose defense can fluster the passer by rushing in numbers or hunting in a smaller pack. Pettine is confident that McCown can handle whatever Denver throw at him, even if the Broncos lead the league with 22 sacks and boast 11 different players with at least one sack each. Moving the ball on the ground and preventing long-yardage scenarios is the key to not putting McCown and the offensive line in harm’s way against the pass rush." Not only do they sack the quarterback, they're hitting him, too, and that has an effect over time," Pettine said. "We're aware of that.” It all sounds relatively simple, but that is why QB Peyton Manning and Co are five and 0.