Allen didn't start in Week 1 for the Bills, but their season began so disastrously with Nathan Peterman the Buffalo coaching staff had no choice but to turn it over to the rookie first-round draft pick.

His numbers aren't spectacular (39-of-70, 515 yards, two TDs, two INTs, 76.8 rating), but last week's convincing win at Minnesota was his first victory and undoubtedly a huge boost of confidence.

Allen actually leads the Bills in rushing (97 yards, two TDs) but strangely, even with that athleticism and mobility, he's been sacked 11 times. His biggest passing plays have been a 57-yard completion to receiver Zay Jones and a 55-yarder to running back Chris Ivory.

Buffalo is looking to get No. 1 RB LeSean McCoy back from a rib injury this week, so his presence could change things for Allen. Certainly the running games Prescott and Trubisky leaned on in their rookie performances against the Packers made a difference.

Allen's own running ability could be the wild card here. He put himself on every highlight reel by hurdling Minnesota LB Anthony Barr in the open field last week. It was a dangerous and risky play but one that showed containing him in the pocket might be the first place to start, limiting the opportunities for him to bail out the offense with his legs.

"This is a big athlete with good vision," Packers defensive coordinator Mike Pettine said. "You give him an open lane and he's going to take it. He'll make you pay. We have to be disciplined in what we do."

With all the talk of the Packers' defense lacking sacks and turnovers through three games, Pettine's message of discipline is an important one. If the Packers try too hard to force mistakes, they may just make a mistake of their own.

One blueprint against rookies is to mix up rush and coverage looks to try to confuse a young QB who hasn't seen much in the NFL yet. Another approach is to see what he wants to do early and then adjust to take those favorite things away as the game goes on.