Jay Cutler's impression of Philip Rivers is impressive. (Photo by Jonathan Daniel/Getty Images)
And then there were three.
The Chiefs are heading into the bye week so they'll be on this list until at least Oct. 10 when they meet the Indianapolis Colts.
As for the Bears and Steelers...Chicago heads to New York to play the Giants while the Steelers will host the Baltimore Ravens.
It's possible the Chiefs could be the NFL's final undefeated team.