KANSAS CITY, Mo. (AP) Ryan Succop kicked a 30-yard field goal in overtime, giving the Kansas City a stunning 23-20 victory over the San Diego Chiefs on Monday night and moving the Chiefs into an improbable tie atop the AFC West.

The Chargers, who had trailed the whole game, were on the verge of winning it in regulation when they marched to the Kansas City 15. With first-and-10 and 48 seconds left on the clock, Philip Rivers fumbled the snap and the Chiefs’ Andy Studebaker clawed under the pile and pulled the ball out.

Gallery: Chargers-Chiefs

Kansas City moved down the field for its own chance to win the game, but Matt Cassel badly overthrew his intended receiver and Eric Weddle‘s second interception sent the game to overtime.