NFL Week 6 grades: Bills earn 'A-' for getting revenge vs. Chiefs; Packers get 'F' after embarrassing loss | CBS Sports Headlines NFL Week 6 grades: Bills earn 'A-' for getting revenge vs. Chiefs; Packers get 'F' after embarrassing loss Here are the Week 6 grades for every team that … Continue reading NFL Week 6 grades: Bills earn 'A-' for getting revenge vs. Chiefs; Packers get 'F' after embarrassing loss