Three touchdown passes by Bill Kenney of the Kansas City Chiefs helped stun the playoff-bound New York Jets, 37-13, before the second-smallest crowd in modern NFL history.
The loss assured the Jets of being on the road when the NFL playoffs begin next weekend.
Only 11,902 fans showed up. The attendance was the lowest in the 11-year history of Arrowhead Stadium. The Green Bay-Atlanta game in 1974, played in a driving snowstorm, drew only 10,200 fans.
The underdog Chiefs (3-6) dominated the visitors in virtually every phase of the game, scoring 20 points in a second-quarter surge for 27-6 halftime lead.
The game started with the Jets taking charge and driving for a 30-yard field goal by Pat Leahy on their first possession.
Kenney's first pass was intercepted by Bobby Jackson and Leahy kicked a 20-yarder for a 6-0 lead with 5:44 left in the first quarter.
But then Kenney made good on 11 straight passes, throwing 28 yards to Carlos Carson for a touchdown near the end of the first quarter and passing 13 yards to Henry Marshall for a score in the second quarter.
Moments later, Richard Todd's pass was intercepted by Thomas Howard on the Jets 47. He sent a lateral to Gary Green at the 42 and the all-pro cornerback ran the rest of the way into the end zone.
Freeman McNeil, the Jets' second-year running back who entered the game with an NFL-leading 703 yards, picked up 83 yards before he was removed in the third period with a hamstring pull.