all have 4-0 record
the Tennessee titans had a record of 13-3 the best that season
The team with the best regular season record in 2004 was the Pittsburgh Steelers at 15-1.
It is technically possible for three teams in one conference to have perfect seasons.
The Packers' best NFL regular season record was in the 2011 season, when they went 15-1.
Yes, the current 2009 NFL season has 2 teams with 11-0 starts. The Indianapolis Colts and New Orleans Saints are the first 2 teams to begin an 11-0 season. A game back is Minnesota Vikings with 10-1 record. This is the first time in NFL history that two teams have been 11-0 in the same season.
Ky was a Cincinnati Bengal's captain and holds the franchise record for most Special Teams tackles in a single season.
No NFL teams went undefeated in 2009.
For the 2008 season, that was the Tennessee Titans at 13-3.
Among existing teams, the Cowboys have the best winning percentage. As of the beginning of the 2010 season, Dallas is 467-339-6 all-time, for a .579 winning percentage.
The 1972 Miami Dolphins posted a 17-0 record (regular season and playoffs).
The Houston Texans, with a record of 2-14, had the worst season in the 2013 NFL regular season.