Dallas Cowboys and Dak Prescott face the sternest examination yet of their Super Bowl ambitions on Sunday when they host a red-hot Green Bay Packers side led by Aaron Rodgers. The Cowboys -- the fabled "America's Team" -- emerged as the surprise package of the regular season after romping to a 13-3 record to clinch top seeding in the National Football Conference playoffs. The Cowboys transformation owes much to the superb form of rookie quarterback Prescott, who was thrust into the starting line-up after Tony Romo was injured in pre-season.
