There is no relationship in sports as critical to success as the quarterback and his head coach. Yet, it is often among the most contentious. Whether it’s butting heads over play-calling, strategy, power, or a personality clash, many of the NFL’s best teams were led by a head coach and quarterback, who could barely stand each other.

Think Bill Belichick and Tom Brady, Phil Simms and Bill Parcells, John Elway and Dan Reeves, Troy Aikman and Barry Switzer, Aaron Rodgers and any head coach he played for. Yet, unlike those volatile partnerships, Kansas City head coach Andy Reid seems more like Patrick Mahomes’s favorite uncle than his head coach. Their genuine respect and admiration for each other have put the Chiefs on the verge of an unprecedented three straight Super Bowl victories when they meet the Philadelphia Eagles on Sunday at the Superdome at New Orleans.