Do nfl fans watch to the same broadcast?

it seems like the same announcers announce charger games, jim natz and phil simms, but it wouldnt be fair if they play teams like broncos and the announcers are biast, jim and phil announce mutiple games a day because they cant travel around the country that fast. plus charger games are always on cbs, but not all teams play on cbs so are two stations threre. also durng preseason they always interview players during the game.