In 2010, the Packers recorded 47 sacks in 2010 against a 2011 total 29. The number of sacks themselves doesn’t mean as much but it does reflect that the Packers were much less effective in pressuring opposing quarterbacks in 2011.
It all comes down to points on the board and no statistic tells the story of the decline of Green Bay's defense better than scoring. Even with all the injuries the Packers had to overcome in 2010, they still finished the season No. 2 league-wide in scoring defense (15.0 PPG) on their way to a victory in Super Bowl XLV. The Packers tumbled to 19th in scoring defense in 2011 (22.4 PPG), more than a full touchdown per game worse than in their championship season.