It was only two teams and one of them was the Dallas Cowboys and I don't know the other one.
There used to be 8 teams. But, starting in the 2012 season, there are 10 teams.
Two teams, the AFC Conference Champion and the NFC Conference Champion, go to the Super Bowl each season.
Dallas cowboys
As of the start of the 2008 season, four teams have finished the regular season 15-1, however, only two of those teams won a Super Bowl. The 1984 San Francisco 49ers and the 1985 Chicago Bears won a Super Bowl. The 1998 Minnesota Vikings, and the 2004 Pittsburgh Steelers did not.
14 teams right now starting in the 2013 season Houston is coming over to make it 15 teams
As of Super Bowl XLII, that has occurred once and that was the 1972 season when the Miami Dolphins finished the regular season 14-0 and then beat Cleveland and Pittsburgh in the AFC playoffs to get to the Super Bowl and beat Washington in Super Bowl VII to finish the season 17-0.
No. But would it be cool if they did?
2000-2001 Season. Ravens and Giants were both 12-4 and meet in the Super Bowl.
The Steelers lost to three teams at home during the 2010 season. The losses were to the Baltimore Ravens, New England Patriots and the New York Jets.
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Dallas cowboys
They won because that's what they played for all season long as well as all the other teams in the NFL. Each season that begins, all 32 teams are hungry to first make it to the postseason and then to the Super Bowl. Once they get to the Super Bowl they play it to win.