The Indianapolis Colts are growing up fast.
As they near the midway point of the season, they've already doubled their victory total from 2011 and at 4-3 are suddenly talking about the playoff picture.
Nobody expected this.
How have they done it?
Most of the players in this year's rookie class - from Andrew Luck to tight ends Dwayne Allen and Coby Fleener - have become key contributors in the first half of the season.