4 games, each season. They were the 12-4 kings. Your viewpoint.is valid, but you have your years mixed up. The NFL counts its season during.the year it began, not the year it ended..so the Broncos are the 2015 champions and the Seahawks are the 2013 champs. What about the 2019 Chiefs? Mahomes, Kelce, Hill on offensw, with the 7th ranked defense? They spotted Houston and Tennessee big leads, then came back and steamrolled then. Then scored 21 straight points in the Superbowl to defeat a formidable SF team. My point is its too early to tell if a team will go down in history.