The most disappointing team and most overachieving team of 2009?

I believe you are right about the Jets, if Shonne Greene did not get injured, the Jets could have won that game. As for the Steelers, but times in the 2000's decade, the following seasons in which after they won a Super Bowl, missed the playoffs. The Philadelphia Eagles and the San Diego Chargers are the 2 main Dissapointing teams of the Decade, great regular seasons but struggling in the playoffs, the Eagles made it to the NFC Championship game 5 times, winning it just once but no Super Bowl victory. Meanwhile the San Diego Chargers won the AFC West 4 years in a row but now Super Bowl appearences, only 1 AFC Championship appearence.