Since the NFL-AFL merger in 1970, there have been 18 times when a team went into a playoff game with a chance to complete a three-game season sweep. Those teams are 11-7. Here are the matchups with the team that won both regular-season games listed first, along with the postseason result:
2007-Dallas Cowboys vs. New York Giants, Lost
2004-Green Bay Packers vs. Minnesota Vikings, Lost
2004-St. Louis Rams vs. Seattle Seahawks, Won
2002-Pittsburgh Steelers vs. Cleveland Browns, Won
2000-New York Giants vs. Philadelphia Eagles, Won
1999-Tennessee Titans vs. Jacksonville Jaguars, Won
1998-Dallas Cowboys vs. Arizona Cardinals, Lost
1997-Green Bay Packers vs. Tampa Bay Buccaneers, Won
1997-New England Patriots vs. Miami Dolphins, Won
1994-Pittsburgh Steelers vs. Cleveland Browns, Won
1994-Minnesota Vikings vs. Chicago Bears, Lost
1993-Los Angeles Raiders vs. Denver Broncos, Won
1992-Kansas City Chiefs vs. San Diego Chargers, Lost
1991-Kansas City Chiefs vs. Los Angeles Raiders, Won
1989-Houston Oilers vs. Pittsburgh Steelers, Lost
1986-New York Giants vs. Washington Redskins, Won
1983-Seattle Seahawks vs. Los Angeles Raiders, Lost
1982-Miami Dolphins vs. New York Jets, Won

Source: STATS, Inc.

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