In the 2003/04 season, Arsenal Football Club played all 38 league matches without losing once.
Arsenal also have the all-time record of playing 49 F.A. Premier league matches unbeaten. This went over three seasons. 2002/03, 2003/2004 and 2004/2005.
The two teams to go undefeated an entire season are Arsenal and Preston.t
There are no more undefeated teams left in the National Football League during the 2010-2011 season
Arsenal that was in 2005
22324 undefeated teams
Presuming you mean so far this season, the remaining undefeated teams are the Saints, Vikings, Broncos and Colts (as of 10-21-09).
No NFL teams went undefeated in 2009.
the last time was 2004-2005, both auburn and Utah went undefeated. USC won the championship.