Week 1: No. 15
The play of the Denver Broncos was a big surprise in 2012, but their preseason ranking was largely based on the unknown of Peyton Manning.
Ranked at No. 15, the Broncos were a team with the talent to make the playoffs if Manning was healthy and close to back to his regular form. We know now that Manning was healthy, and as the season progressed he very much returned to his old self.
While the team isn't quite good enough to win a Super Bowl, it's close. John Elway needs to add pieces on defense, but the Broncos will start the 2013 season ranked higher than they started out last year.