Cairo Santos kicked a 48-yard field goal field goal with 21 seconds left and the Kansas City Chiefs beat San Diego 23-20 Sunday, snapping the Chargers' five-game winning streak.

The Chiefs moved into field goal range thanks to Alex Smith, who completed three straight passes on the drive for 53 yards, including a 29-yarder to Dwayne Bowe.

Smith was playing on the same field where he led Helix High to consecutive San Diego Section championships.

Coming off their bye, the Chiefs (3-3) made the AFC West a three-team race, pulling within 1 ½ games of San Diego (5-2). The Denver Broncos (4-1) hosted San Francisco on Sunday night.

The Chargers flunked their sternest test in a month and lost for the first time since a defeat at Arizona in the season opener.

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