It was done 11 times through the 2008 season. See How_many_NFL_teams_have_beat_the_same_opponent_three_times_in_one_season
Before the 2008 season, there have been 18 meetings and the team that won twice in the regular season won 11 times. The Steelers have a chance to make it an even dozen in Jan 2009.
The Dallas News has a complete breakdown. http://www.dallasnews.com/sharedcontent/dws/spt/football/cowboys/stories/010708dnsponfl3wins.19ede6b.html
It has happened on several occassions, such as the Dallas Cowboys facing the Philadelphia Eagles in their 1990s Superbowl runs, the Tennessee Titans facing the Jacksonville Jaguars in 1999, and the New England Patriots facing the Miami Dolphins in 1985 and 1997 and facing the New York Jets in 1985 and 2006.
1986 new youk giants defeated the Washington Redskins 3 times with the final victory coming in the nfs title game 17-0.
Yes, the team that wins the first two is 12-7 in the third game (playoffs). So it's happened 12 times.
The New England Patriots.
the Pittsburgh Steelers with 6 super bowlwins Cowboys with 5 and 49ers with 5
The Raiders have won three Super Bowls.
they have three
Three, all with the 49ers. He was the backup QB to Joe Montana in Super Bowls XXIII and XXIV and the starting QB in Super Bowl XXIX.
The Cowboys quarterback started three Super Bowls in four seasons (Super Bowls XXVII, XXXVIII and XXX) and won all three.