A little Preseason trivia...
In 2004, Green Bay scored two offensive touchdowns during the preseason, and averaged nine points per game. They turned it around in the regular season, scoring 26.5 points per game. That was fifth best in the NFL.
In 2008, Detroit had the NFL's best defense in the preseason, surrendering 6.8 points per game. The regular season was another story. They gave up 32.3 points per game when it counted, which was worst in the league.
That same season, Seattle was the most prolific preseason team, averaging 25.8 points per game. But as with the Detroit defense, the regular season changed things. The Seahawks struggled on offense, 24 teams did better than their 18.4 ppg.
And then there are the 2009 New York Jets. They led the league in defense after allowing just 14.2 points per game. But their preseason results weren't so great--they were 29th in the league, giving up 24 points per game.