It could be argued that no position has changed more in the NFL's history than the tight end. Once primarily a sixth offensive lineman who would catch the occasional pass, tight ends have become key cogs on offense.
The Indianapolis Colts were one of the NFL's surprise teams last season, winning 11 games and making it to the playoffs. What does quarterback Andrew Luck have in mind for an encore? Here's our look at the Colts' 2013 NFL schedule.