Two teams so absent from championship history for so long until recently face off for the AFC championship.

The Kansas City Chiefs won their first NFL title since 1970 when they beat San Francisco in last year's Super Bowl. When they host Buffalo, the Chiefs will take on a franchise that went from the 2000-2016 seasons without even getting to the playoffs.

What we get Sunday is a matchup of dynamic offenses and overlooked defenses, the top two teams in the conference. Kansas City (15-2) has the confidence of a reigning champion and a charisma few NFL teams can match. Buffalo (15-3) has an undy...