The Kansas City Chiefs started the season 0-2, and NFL fans across the country were rejoicing that the dynasty was finally over.

However, things have changed quickly as the Chiefs got Xavier Worthy and Rashee Rice back, and now have an offense that resembles the early days of the Patrick Mahomes era.

They are 5-1 in their last six games, and look like the favorite once again to go to the Super Bowl

Up next is another matchup with Josh Allen and the Buffalo Bills in a matchup that has become the best rivalry in the NFL.

Allen has a 4-1 record against the Chiefs in the regular season, but it is the 0-4 record that haunts him and Bills fans. The Indianapolis Colts lost to the Pittsburgh Steelers on Sunday, so the race for the No. 1 seed in the AFC is wide open.

Kickoff is scheduled for 4:25 p.m. ET, and the game will be on CBS. 

Bills will start with the ball.

BUF 1st Drive: Clinical drive by the Bills. Established the run with James Cook, and then Allen drops a dime to Dalton Kincaid for a touchdown.

Bills 7, Chiefs 0 with 8:00 remaining in the first quarter.

KC 1st Drive: 3-and-out for the Chiefs... Couldn't draw up a better start if you're Buffalo.

BUF 2nd Drive: Bills decide to go for it on 4th down, and the Chiefs get the stop.... Kansas City will have great field position.

Bills 7, Chiefs 0 4:17 remaining in the first quarter.

KC 2nd Drive: Rashee Rice makes this offense even scarier, and he delivers with a touchdown to tie the game up.

Bills 7, Chiefs 7 14:56 remaining in the first half.

BUF 3rd Drive: A three and out as the Chiefs get to Allen on a third down... Bills had Chiefs pinned back at the 22, but a 15 yard facemask gives the Chiefs the ball at the 37.

KC 3rd Drive: Chiefs get down the field, but settle for a FG to take a 10-7 lead.

BUF 4th Drive: Huge play from Allen to Kincaid for 47 yards, and Johnson goes in for the touchdown.

Bills 14, Chiefs 10 with 6:39 remaining in the first half.

KC 4th Drive:  Like the Chiefs defense earlier, the Bills stop the Chiefs on fourth down.

BUF 5th Drive: Big 3rd and 3 here for the Bills. Get it here and they can prevent the Chiefs from getting the ball back to end the half.

Josh Allen sets an NFL record with his 78th rushing touchdown, breaking Cam Newton's record of 77.

KC 5th Drive: Chiefs get to the one-yard line, but can't score a touchdown and have to settle for a field goal.

Bills 21, Chiefs 13 at the half.

KC does get the ball to start the second half.

KC 1st drive of second half: Another three-and-out for the Chiefs. Bills defense is getting a huge boost from second year safety Cole Bishop who has made a ton of plays.

BUF 1st drive of second half: Key to the game has been can the Chiefs stop the first down run. They finally did, and forced a punt to Buffalo.

KC 2nd Drive of second half: Weird play as Mahomes is called for an intentional grounding, even though the ball was clearly tipped. Bills defense is doing an outstanding job and force another punt.

Bills 21, Chiefs 13 5:31 third quarter

BUF 2nd drive of second half: Allen is playing a terrific game, and he finishes off another impressive Bills drive off with another rushing touchdown. Bills in Complete control of this game.

Bills 28, Chiefs 13

End of 3rd quarter: Bills 28, Chiefs 13 but KC is driving at the Bills 30.

KC 3rd drive: WHAT A DRIVE! Chiefs convert a 4th and 17, and then score on a 4th and 1 to cut the deficit to 28-21. Game on!

Bills 28, Chiefs 21 with 11:32 remaining in the game.

BUF 3rd drive of the second half: The Chiefs defense gets a huge stop, as they sack Josh Allen on back-to-back plays to force a punt. Somehow, the Chiefs are 88 yards away from potentially tying up the game.

Bills 28, Chiefs 21 with 6:46 remaining in the game.

KC Drive: Mahomes is picked off. Bills got the ball at their own 35 with a chance to put this game on ice.

Bills WIN 28-21.

With the win, the Bills are 7-2 on the season, while the Chiefs fall to 5-4.