If the Patriots lose a game they would have 4 losses, and even if the Ravens lost their last 2, they would have the same record but own head to head tiebreaker. But that would not guarantee the Ravens the top seed because KC, I believe, if they win out would be 12-4, and if the ravens were also 12-4, KC would be the top seed. Simply put, Ravens need to beat the Browns and they are the number one seed.