the 1972 Miami Dolphins, they were 17-0. they beat the Washington Redskins 14-7 in the super bowl. the 2nd best was the 2007 pats, the were 18-1. they had an 18-0 start, but lost 2 the giants 17-14 in super bowl XLII (42). the pats had 10 seconds 2 go 19-0, 4th &20, ball on the NE 20. tom brady threw downfield on the left sideline 2 randy moss, who dropped the ball on the NYG 11. incomplete pass. the clock ran from 4 sec to 1 sec. Eli manning took a knee and puled off the upset.
Chicago Bears
The Houston Texans.
It depends upon the league/sport. In the NFL, for example, the team with the best overall record wins their division. In the event of a tie, the division record acts as the tiebreaker. I believe the best conference record wins the conference in NCAA Football, regardless of overall record. Then there are the league like the NHL, where a team earns 2 points for a win, 1 for a tie or post regulation loss--with the team accumulating the most points winning their division/conference.
The Detroit Lions.
washington redskins
Titans.
The NFL team with the worst overall record in 2008 was the Detroit Lions, who were 0-16.
the New England Patriots had the best record in 2010 (14-2)
The worst NFL team in history based on their overall performance and record is widely considered to be the 1976 Tampa Bay Buccaneers. They finished their inaugural season with a record of 0-14, failing to win a single game.
The 1983 Washington Redskins hold the record for the best turnover differential in NFL history.
denver broncos... XD
The team with the best regular season record in 2004 was the Pittsburgh Steelers at 15-1.