Buffalo Bills head coach Sean McDermott was hired in 2017. That’s only five years ago, but in the ever-changing landscape of the NFL, that makes him one of the longest-tenured leaders in the entire league.
First on the list should come as no surprise, as Bill Belichick has been on the sideline for the New England Patriots since Bill Clinton was President (2000).
New Orleans Saints head coach Sean Payton was second on the list, signing up in 2006, but he retired this week, allowing the rest of the field to move up.