Regular season: Patriots & Panthers Regular season & Playoffs: Panthers
The 1976 Tampa Bay Buccaneers went 0-14. The 1960 Dallas Cowboys went 0-11-1. The 2009 Detroit Lions went 0-16.
The Detroit lions went 0-16 in the 2008 season.
The Texans, Vikings, and the Ravens.
A total of 127 teams have had two 20 game winners.
Through the 2009 season, that would be the Houston Texans.
Chicago Bulls won 72 games with a record of 72-10 in the 1995-96 regular season. :)
Don't know if there are multiple teams, but the Houston Texans are (0-10) vs the Colts in Indy.
Through the 2011 regular season, the two teams have never met in football.