From 2001-2019, thew New England Patriots missed the postseason just twice under Coach Bill Belichick. It obviously helped that he had quarterback Tom Brady, the greatest of all-time, for all those years.
But Belichick also was the guy who turned to a young Brady way back in 2001 to take over as the starter. One of those seasons where the Pats did miss out on extra football was 2008 when Brady was lost to a season-ending injury in Week 1.