The NFL only shows 2 games a Sunday if the home team is playing at home. This weekend, we got SF @ Washington, with no game on CBS, and then Bear @ Baltimore. I don't care about either game, so I wouldn't have watched any NFL without cable. I have NFL Redzone, so that's what I watched. The Sunday night game is one way too late here, so I rarely watch NBC's game.
All of sports are suffering from cordcutters. The NFL's poor TV scheduling is exasperating the problem, especially with its Thursday NFL Network game that so few people have.