The biggest change in Minnesota's playbook for the 2009 season is simple: Percy Harvin.
The Vikings have big-play ability built into their offense with Adrian Peterson at running back and Bernard Berrian as a deep threat.
But Harvin—if he stays on the straight and narrow—brings something different that the Vikings have not had in years.
Harvin has blazing speed, great vision, and can play receiver, running back, or return kicks.
The former University of Florida star also has the ability to catch a swing pass or screen out of the backfield, which is something that has been missing for far too long in Minnesota's offense.
With the option to get Harvin involved in the return game—if that is an option Brad Childress explores—coupled with his versatility on offense, Harvin could be a huge factor for The Purple as defenses key on Peterson and respect Berrian streaking down the field.