Why? The Chiefs became one-dimensional, while the Patriots had running back Corey Dillon producing well, although he fell 2 yards short of having his sixth 100-yard game (the Patriots are 5-0 in those games).
While Kansas City's Trent Green, who threw for 381 yards, made some connections against the Patriot zone defenses, the burden of pulling off the upset fell all on his shoulders, and he couldn't do it.
Green exploited some of the inexperienced members of the Patriots' defensive backfield, most notably Earthwind Moreland, who twice was burned for touchdowns. But Green wasn't helped when veteran receivers Eddie Kennison and Johnnie Morton had balls clang off their hands in key moments.
The Patriots held Blaylock to 58 yards and the Chiefs to 64, about 100 fewer than they were averaging.
New England did so without even having to use safety Rodney Harrison up on the line; he spent most of his time trying to slow down tight end Tony Gonzalez, sometimes as part of double coverage.
Slowing the Chiefs' running game had another benefit: It helped quiet a stadium in which the fans can be among the loudest in the country, making for a horror show for opposing teams.
After practicing with crowd noise piped in, the Patriots knew what to expect.
"The guys up front did an unbelievable job." said Harrison. "We had set out to control things up front, and against that offensive line, what a job our guys did."
If any offensive line should have given the Patriots all they could handle, it would have been this one. It's a line filled with Pro Bowlers and future Hall of Famers, but Richard Seymour, Ty Warren, Jarvis Green, Vince Wilfork, and Keith Traylor never allowed them, and thus the run game, to get momentum.
Warren might have had his best game as a Patriot, with seven tackles, two sacks, and numerous appearances in the Chiefs' backfield.
Early in the season and in their only loss this season, against Pittsburgh, there was concern expressed about the Patriots stopping the run. Do they have a stout run defense after all?
"There were times out there where I'd fight my way over to make a play and the guy had already been wrapped up. I can't tell you how many times that happened," linebacker Ted Johnson said.