If your talking about the 2011/2012 season then so far Green Bay are undefeated with a score off 8-0-0
The undefeated 2009-2010:
New Orleans Saints, The Indianapolis Colts, Denver Broncos, New York Giants, Minnesota Vikings.
No NFL teams went undefeated in 2009.
1948
what NFL teams srored 33 points only this year 2013
Probably not this year
as of this year only the Vikings have
No nfl teams are playing today
32 NFL football teams
Click on the 'The NFL in 1950' link on this page to see the teams and rosters of the teams that were in the NFL in 1950.
Click on the 'Chronology of NFL Teams' link on this page to see when every team that has participated in the NFL joined and when those that folded left.
No
As of 2013 there are no American Football teams in England. Once a year two teams from the NFL travel to England and play at Wembley stadium. There are rumors that the NFL wants to expand into Europe though.
Wade Phillips, currently the coach of the Dallas Cowboys, has lead 4 teams to the NFL playoffs in his 31-year coaching career.