Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
What about EyeTV or SlingBox Apps. You won't get every game but you can still watch what's on in your area.

I use the EyeTV and it's been pretty good. It's much better on WiFi but still not to bad.
 
I'm pretty sure DirectTV owns the rights to stream NFL games, so you won't find anything else legal. They are slowly adding it to certain markets where you can sign up for streaming Sunday Ticket without being a DirectTV customer.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.