$2.1 billion Owner:
The Cowboys have been the NFL's most valuable team since 2007 thanks to the league's highest sponsorship and premium seating revenues--a combined $200 million. The 'Boys inked QB Tony Romo to a six-year, $108 million contract extension in March despite only one playoff win during his eight years under center. (Getty Images) More From Forbes
: The World's 50 Most Valuable Sports Teams 2013 The World’s Highest-Paid Athletes Baseball's Most Overpaid Players The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.