SAN DIEGO (AP) – 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 43 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 made the AFC West a three-team race, pulling within 1 1/2 games of San Diego. The Denver Broncos 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.