2011 Green Bay Packers season
They were the defending Super Bowl 45 champions after they won against the Steelers 31-25. They not only improved from their 10-6 record but also became the sixth team to win at least 15 games. Like the 2009 Saints, 2005 Colts, and the 1998 Broncos, they won the first 13 games of the season and lost the next game. The 2009 Saints and the 1998 Broncos won their Super Bowls at that time.