In 2008, the Detroit Lions did not win a single game, ending the season 0-16, making them the only team to complete a 16-game regular season winless. Previously, the most losses in a winless season was in 1976 by the Tampa Bay Buccaneers who went 0-14. The Dallas Cowboys went 0-11-1 in 1960. It was the first year in the league for both teams. The 1982 Baltimore Colts were the last winless team before the Lions, going 0-8-1 in the strike-shortened season.
There were many winless seasons in the NFL's early years. Since World War 2 the only full winless seasons were by two first year expansion teams -- the 1960 Dallas Cowboys (0-11-1) and the 1976 Tampa Bay Buccanneers (0-14). In the strike-shortened 1981 season, the Baltimore Colts went 0-8-1. http://www.sportingnews.com/archives/sports2000/expert/011899.html On December 28, 2008 the Detroit Lions lost 31-21 against the Green Bay Packers to become the NFL's first team to go 0-16 in a season.
The record for fewest wins in a full 82 game NBA season is nine by the 1972/1973 Philadelphia 76ers. Their record was 9-73 and they finished 59 games behind the division winning Boston Celtics.
In the 2011/2012 season, which was shortened by a lockout to 66 games, the Charlotte Bobcats won only seven times, one of which was in their opener against the Milwaukee Bucks. this gives the 2011/2012 Bobcats a winning percentage of .106, which is the lowest ever. (If we exclude their opening win, the Bobcats would have been the first NBA team with a winning percentage below .100)
In the strike season of 1982, the Cleveland Browns and the Detroit Lions made the playoffs with 4-5 records. A different playoff format was used where the top 8 teams in each conference were seeded.
Yes the 2010-2011 Seattle Seahawks 7-9 and beat the saints but as of the moment are still in the playoffs.
The Houston Texans are the only current NFL team not to have a winning season. Several defunct NFL teams share the honour, most recently the first Dallas Texans team, and their predecessor, the original incarnation of the Baltimore Colts. A large number of teams from the 20's through 40's never had a winning season, and the majority of teams that played in the AAFC never had a winning season. However, most of those teams were only around for a few years. Houston's seven-for-seven seasons of futility is the record for the NFL as we know it (ie, post 1930 or so.)
Cinncinnati bengals
The Pittsburgh steelers with 6!
San Francisco. It was formerly an NFL record for wins in a decade, but the Colts broke it last week.
Dallas Cowboys
lions
The team that wins the super bowl that year.
Miami dolphins 17 straught wins
The Chicago Bears have the most victories in NFL history. They are 744-568-42.
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Chicago Bears
1985 Chicago Bears: record 15 wins, 1 Loss and won the Superbowl 46 to 10.
Cinncinnati bengals
Packers
Raiders
The Chicago Bears
Chicago Bears
Steelers