No NFL teams went undefeated in 2009.
There are no more undefeated teams left in the National Football League during the 2010-2011 season
no team in the NFL this season is undefeated but the colts and the saints were but lost a couple of games
Currently, the Indianapolis Colts and the New Orleans Saints are undefeated at 11-0.
Every year 16 NFL teams start 1-0.
Miami Dolphins and New England Patriots are the only Nfl teams to go undefeated in the regular season, but the Dolphins are the only team to go undefeated and also win the Superbowl.
In the 2009 season: the Colts and the Saints. First time in NFL history two teams have been 12-0 in the same season.
As of the end of the 2007 season, there have been four teams in the NFL that have had undefeated/untied regular seasons: 1934 - Chicago Bears 1942 - Chicago Bears 1972 - Miami Dolphins 2007 - New England Patriots Of those four teams, only the 1972 Dolphins won the NFL championship and completed the season undefeated.
The two teams to go undefeated an entire season are Arsenal and Preston.t