The NFL actually has it's own network - http://en.wikipedia.org/wiki/NFL_Network They have a couple of specialty programs like "NFL Red Zone" which shows every football game simultaneously, something which regular channels (ABC, NBC, Fox) can't do because of licensing restrictions.
right of course. i thought your intent was to imply non-network possibilities for the second screen. for instance, there is no reason NFL (the league) could not create a sync-to-broadcast app regardless of wether or not they are the ones syndicating the actual broadcast.
