In an absolutely electric scene at Highmark Stadium, the Buffalo Bills handed the Chiefs their first loss of the season. And while Kansas City showed signs of rallying in the fourth quarter, it was Allen who closed the door with his touchdown run to stretch the game to two possessions.

The Buffalo Bills defeated the Kansas City Chiefs to hand Patrick Mahomes his first loss of the season, and Josh Allen's game-winning performance could have lasting implications

The Kansas City Chiefs' perfect season came crashing down in Buffalo, which has led to one bold claim in the MVP discussion between leading candidates Patrick Mahomes and Josh Allen