Colts, Broncos and Saints as of 10-26-09.
1972
No NFL teams went undefeated in 2009.
Colts and Saints.
1972 Miami Dolphins, that is it
Dolphins
Colts and Saints.
There are no more undefeated teams left in the National Football League during the 2010-2011 season
patriots
2009
no
1900`s Miami Dolphins
Chicago bears