The Chiefs are still undefeated, and they did it in a game that showed both how deep this roster has become and how quickly a new performer can seize a share of the spotlight.

Kansas City’s offence has been less explosive than in previous seasons, but it has been more balanced, with a defence capable of taking the ball away and a rushing attack that grinds out the clock.

The new star provided the decisive moments, and the result suggests this version of the Chiefs may be less dependent on one exceptional unit than the teams that preceded it.

Four unbeaten weeks is a strong start, though the schedule that produced it has not yet asked the hardest questions.