Despite the NFL-best 8-0 record, the Green Bay Packers are ranked 30th in the league in yards allowed per game. They are also only 18th in sacks. Those two stats need to change if the Packers want to continue this historic win streak.
There are a lot of reasons why the Packers defense is significantly worse than it was last year when they won the Super Bowl. They aren't getting to the QB, there have been too many blown coverages, etc.
Bottom line, they need to get it together. The offense is nearly unstoppable, but come playoff time, they are going to need the defense to step up if they want to repeat as Super Bowl champions.