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The pass rush, with 14 sacks through five games, is improved. Last season, the Chiefs had 31 sacks over 17 games, leaving them 29th in the league. The Chiefs need to improve their pass rush with their front four other than Chris Jones when they don't blitz. The Chiefs have eight sacks with their down linemen, including three from Jones. Linebackers or defensive backs have the other six.

The stage was set for more Mahomes Magic against the Bills at Arrowhead, but this time, it was the visitors celebrating in the end. Patrick Mahomes was pressured by Von Miller -- a star playing on the other side of the country when these teams met in January's Divisional Playoffs -- before Mahomes tossed the game-deciding interception late in the fourth quarter. The pick sealed a 24-20 loss against a rival that Kansas City will likely see again come January. "It was a great battle. You love these games," Andy Reid said. "You just don't want to be sitting on this end of it. But you love the competition and the way the guys get after it."

There is no shame in losing to the Bills, but they might be heading out on the road now in the postseason for a big game. The defense did limit the Bills to 24 points, which is a good sign going forward.

Even without WR Tyreek Hill, they're still the league's top-scoring team. But what about mixing in physical rookie RB Isiah Pacheco just a bit more often, Andy?

The Chiefs will be fine, but their already difficult road ahead — they had the hardest schedule in the league before the season started — is significantly harder following the loss to the Bills. Kansas City is essentially two games behind Buffalo now for the top seed. Football Outsiders projects the Bills to have a 74.5 percent chance of being the AFC's No. 1 seed, while the Chiefs are all the way down at 5.3 percent.

Bills cornerback Taron Johnson secured a game-clinching interception to prevent any final-minute heroics from Patrick Mahomes and hand the Chiefs their second loss of the season, but Kansas City is still a clear no. 2 in the AFC. Mahomes is 1B to Allen's 1A among quarterbacks right now, and that will keep the teams on a trajectory to the AFC championship game regardless of the supporting cast. Still, if Mahomes is tasked with beating the Bills in Buffalo come late January, he'll have a tough time doing so—especially when the rest of the team isn't giving him a ton of help. Kansas City's offensive line ranks 28th in pressure rate allowed (36.5 percent), and the defense ranks 29th in success rate (52.9 percent) through Week 6.

The Bills are good. I wouldn't worry too much about Sunday's loss because the Chiefs are still one of the very few teams this season that clearly is good, and they are capable of winning a playoff game in Buffalo if they have to. The road, however, is tougher after Sunday's loss.

They'll need to dig deep to avoid falling to 4-3, with a Super Bowl LIV rematch looming.