Welcome to the big time, Brad Keselowski.
The newly crowned Sprint Cup champion has been on a whirlwind media tour over the past few days, appearing everywhere from SportsCenter to the Late Show with David Letterman. So far, the 28-year-old Penske Racing driver has been everything NASCAR could ask for; humble, outspoken, and downright hilarious. Quite honestly, the way he represents the sport as its new champion has the potential to draw in many of the fans that the sport has lost over the years.
That doesn't mean that anybody's just going to let him keep this up, though.
Anybody in racing will tell you that they have an ego that drives them to be the best at what they do. While Keselowski satisfied his with the 2012 title, there are plenty of competitors that walked out of this season unsatisfied and especially motivated to knock the new champion off the mountain in 2013.
Besides that, Keselowski is going to be at a handful of competitive disadvantages next year, particularly as Penske switches manufacturers.
In short, a repeat title is not going to be easy. Here are seven reasons why: