No NFL teams went undefeated in 2009.
Dolphins
The Miami Dolphins. The New England Patriots went undefeated until the superbowl.
1972
No AFL team ever went undefeated. The 1972 Miami Dolphins are the only NFL team to have ever gone undefeated.
im not sure of all them but i know that the Miami Dolphins have gone undefeated, and the New England Patriots have gone undefeated.
Colts and Saints.
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.
the MIAMI DOLPHINS went undefeated in the year 1972
Colts and Saints.
1972 Miami Dolphins, that is it
There are no more undefeated teams left in the National Football League during the 2010-2011 season