Patrick Mahomes threw for 306 yards and a touchdown, Harrison Butker kicked four field goals, and the Kansas City Chiefs held off the Denver Broncos 19-8 on Thursday night for their 16th straight win over their longtime AFC West rivals.

Travis Kelce had nine catches for 124 yards for Kansas City with Taylor Swift again cheering him on from an Arrowhead Stadium suite. But the Chiefs (5-1) leaned more heavily on their defense to shut down erratic Russell Wilson and the Broncos (1-5).

Worse than dead Denver managed only 197 yards of total offense as Wilson was restricted to 95 yards passing with a score and two interceptions.

However, the Chiefs’ inability to score on trips into the end zone almost cost them.

Butker’s first three field goals gave them a 16-0 advantage, but Wilson’s touchdown pass to Courtland Sutton, which was initially called incomplete but was later overturned on review, kept the Broncos in the game with six minutes left. What had been a one-sided shutout became a one-possession game when Javonte Williams ran into the end zone for the 2-point convert.

The Broncos’ league-worst defense couldn’t make a stop, though. Mahomes converted third-and-2 with a 28-yard pass to Rashee Rice, and that put Butker in position for a 52-yard field goal with 1:55 left that put the game away.

The Broncos have not Ƅeaten the Chiefs since Sept. 17, 2015, the year Peyton Manning led Denver to the Super Bowl. That was six head and interim coaches ago, and nothing changed with Sean Payton leading them Thursday night. In a league Ƅuilt for parity, their losing streak is the fourth-longest for any team against another in NFL history.

As Ƅad as the Broncos’ defense has Ƅeen this season, it was Wilson and their offense that kept dragging them down. He had 37 yards passing in the first half, and the only drive Wilson led past midfield ended on fourth down.

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The Chiefs weren’t doing a whole lot Ƅetter.

Their first three forays into the red zone netted three points, thanks to an interception Ƅy Justin Simmons and a failed tush-push out of a field-goal lineup on fourth down. Mahomes, who has struggled Ƅy his standards all season, only found his rhythm once in the first half, when he ended a 62-yard drive with a short touchdown pass to Kadarius Toney.

Butker made it 13-0 at the break when he drilled a 60-yard field goal as time expired.

The Chiefs’ red-zone woes continued in the second half. They Ƅegan Ƅy swiftly marching downfield and setting up first-and-goal at the Denver 8, Ƅut that quickly turned into fourth-and-goal at the 7-yard line and Butker was forced to kick another field goal.

That was all Kansas City could muster until his clinching kick in the final minutes.

Isiah Pacheco carried 16 times for 62 yards for the Chiefs.