The Kansas City Chiefs (5-0) and Minnesota Vikings (5-0) both had byes in Week 6, so their unbeaten records will stand for at least one more week.
Elsewhere in the NFL, the Houston Texans improved to 5-1 on Sunday with a convincing 41-21 victory over the struggling New England Patriots (1-5).
The Detroit Lions (4-1) also made a statement with a huge 47-9 demolishing of the Dallas Cowboys (3-3) on the road.
Meanwhile, the Chicago Bears are suddenly 4-2 following their 35-16 victory over the Jacksonville Jaguars (1-5) in London.