I am usually not a big fan of ESPN, but Ian O'Connor wrote a great piece on comparing Tom Brady vs. Michael Jordan and trying to determine which athlete should be considered the USA greatest athlete of all time. 

Michael Jordan athletically is superior to Tom Brady. The NBA is setup for superstars to be successful and MJ played in a watered down NBA. Tom Brady on the other hand plays in the league where parity is supposed to rule. Brady has always had a much more difficult road to 6 championships than Jordan ever did. If Tom Brady wins his 6th, I would have to say that imo Tom Brady is the greatest of all time. What you you think?

http://www.espn.com/nfl/story/_/id/22211056/tom-brady-vs-michael-jordan-greatest-all-goat-scorecard