The 1984 San Francisco 49ers went 15-1 in the regular season and wound up winning Super Bowl XIX to finish the season with an 18-1 record.
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The 1985 Chicago Bears and the 2007 New England Patriots also won 18 games in a single season.
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The Patriots are the ONLY team to be perfect in the regular and post season's and lose the superbowl They went 16-0 then won their 2 playoff games then lost the Super Bowl
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As of the 2008 season: 1984 San Francisco 49ers, winners of Super Bowl XIX.
1985 Chicago Bears, winners of Super Bowl XX.
2007 New England Patriots, losers of Super Bowl XLII.
No NFL teams have no cheerleaders. They all have them and many of them.
The Detroit lions went 0-16 in the 2008 season.
32 teams
Through Super Bowl XLIV, 1, the 2001 New England Patriots that defeated the St. Louis Rams in Super Bowl XXXVI.
In the 2008 season the patriots lost to the dolphins,chargers,colts,jets,steelers and patriots went 11-5 in that season