– Chiefs kicker Harrison Butker drilled a 43-yard field goal with 8 seconds left in his first career game, atoning for an earlier miss and helping Kansas City to a 29-20 victory over the Washington Redskins on Monday night.

Signed off the Carolina practice squad earlier in the week, Butker missed a 46-yarder in the first half before hitting three attempts in the second. The first tied the score 17-all, the next gave the Chiefs the lead and the last made Kansas City (4-0) the league's only undefeated team.

The Chiefs put an exclamation point on the win when linebacker Justin Houston picked up a fumble as the Redskins (3-2) were trying to keep the game alive and returned it for a game-ending touchdown.

The last time there was only one unbeaten team through the first four weeks of the season was 2010, when the Chiefs were the final team standing. They went on to win the AFC West.

Alex Smith threw for 293 yards with touchdowns on the ground and through the air.

Travis Kelce hauled in seven catches for 111 yards and a touchdown, while Chiefs rookie Kareem Hunt pounded away 21 times for 101 yards against the Redskins' stout defensive front.

Kirk Cousins had 220 yards passing and two touchdowns for Washington, but his throw to the end zone with 50 seconds left was dropped by Josh Doctson and forced the Redskins to kick a field goal.

That missed opportunity came back to haunt them less than a minute later.

The Redskins stunned the Chiefs early when Cousins found Terrelle Pryor over star cornerback Marcus Peters for a 44-yard touchdown pass, then drove to the goal line before settling for a field goal.

It was 17-all after Butker, signed to replace the injured Cairo Santos off Carolina's practice squad, made his first career field goal. Then, the Chiefs picked apart a Redskins defense down to four healthy defensive backs to set up his 32-yard kick.

After the Redskins tied the score once more, Butker delivered the biggest kick of his life.

Redskins cornerback Josh Norman departed in the second quarter because of a rib injury, and backup Quinton Dunbar left early in the fourth.