Leo says that live TV over the internet is coming, but right now, many require a pay service subscription. It won't be too long before the NFL follows the lead of Major League baseball. In the meantime, he can use the Slingbox, which will allow him to connect it to his cable/satellite box and then log in to watch while he's on the road.
According to the chatroom, he can watch the NFL pre-season and download a free NFL app for iPhone, iPad or Android. The streaming of the pre-season is $15. He can also watch the NFL Sunday Ticket on his iPhone or iPad if he's a DirecTV subscriber.