The team with the most losing seasons in modern era NFL (since the Super Bowl) are the Tampa Bay Buccaneers, who lost 14 season in a row from 1983 to 1996. In 1996, Tony Dungy was hired as head coach of the Bucs, Warren Sapp, Derrick Brooks and Warrick Dunn were drafted and the team made the playoffs in the 97 season with a 10-6 record. The Bucs are also the only team to lose every game in a season. They went 0-14 when the team started in 1976. Since then, the season has expaned to 16 games.
The New Orleans Saints were winless in 20 seasons from 1967 (where the franchise started) up and till the 1986 season. They did however have two 8-8 seasons (1973, 1983) and therefore they are not "winless".
Eagles were winless for 11 seasons (1967-1977).
Lastly there is the Detroit Lions who went 0-16
Arizona Cardinals, with an astonishing 57 losing seasons (including strike years and pre-Superbowl seasons). That is over 64% of their seasons.
They have had 5 seasons where their record was .500, and just 27 seasons of their 89 in existence where they have posted a winning record (excluding 2009, which they will finish with a winning record).
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Dallas Cowboys (1966-1985).
The New Orleans Saints.
Packers
Oilers
The Green Bay Packers.
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The Dallas Cowboys have 26 10+ win seasons, the most all time in the nfl. Dallas achieved this feat in 50 nfl seasons of play. The Green Bay Packers are 2nd all time with 25 10+ win season. This was accomplished in 92 nfl seasons.
well it would be the Oakland raiders they are the worst team in history
Detroit just broke their own record by losing 25 consecutive road games. They set the record previously during the 2001-2003 seasons.
The Tampa Bay Buccaneers still hold the longest losing streak record in the NFL. They went 0-26 in 1976 and 1977, there first two seasons in the league. The did manage 2 wins at the end of the 1977 season.
The losing streak was 26 games, starting with their first game in the NFL.
Houston Texans (zero)
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Dallas Cowboys