Buffalo Bills (15-4) at Kansas City Chiefs (16-2)
With the Lions losing in their first playoff game last week, the Chiefs have the best record in the league at 16-2 and one of those two losses was a meaningless week 18 game when they didn’t play their starters with the one seed already locked up. However, the Chiefs won a lot of close games, with just six wins by more than seven points and a 10-0 record in games decided by seven points or less. The Bills have a worse record than the Chiefs, but still have much better numbers in terms of yards per play differential (+0.42 vs. -0.08) and comparable numbers in terms of first down rate differential (1.21% vs. 1.29%), when you exclude both teams’ meaningless week 18 games.
Typically first down rate differential and yards per play differential are significantly more predictive than win/loss record and, along with that, a teams’ record in one-score games is not predictive, but the Chiefs are now 50-19 in one-score games when Patrick Mahomes starts, which is a pretty big sample size. For comparison, the Bills are just 22-20 in one-score games with Josh Allen since his breakout season in 2020, as good as Allen has been over that time period.
The gap between these two teams in terms of the aforementioned metrics might suggest this is not necessarily going to be a close game, but my roster rankings have these two teams about equal. The Chiefs are only missing one week 1 starter, wide receiver Rashee Rice, who has been out since week 4, and they have replaced him well by trading for DeAndre Hopkins after week 7 and getting back Marquise Brown after he missed the first 14 games of the season with injury.
The Chiefs have also recently gotten back other key players in running back Isaiah Pacheco (10 games missed), edge defender Charles Omenihu (11 games missed), and cornerback Jaylen Watson (11 games missed) and they have significantly improved their offensive line by moving Joe Thuney from left guard to left tackle, which is a more important position. As a result, they seem to have gotten better as the year has gone on, with four of their six wins by more than seven points this season coming in their last four meaningful games. The Bills, on the other hand, were one of the least injury plagued teams in the league this season, but now enter this AFC Championship game missing top safety Taylor Rapp and potentially top cornerback Christian Benford, who has yet to clear the concussion protocol.
With this likely to be a close game, the Chiefs seem like the right side. Perhaps unsurprisingly, given their tendency to win close games, the Chiefs have been great this season against the spread when not big favorites, going 7-2 ATS as underdogs or favorites of six points or fewer (excluding week 18), as opposed to 0-7-1 when favored by more than six points. Going back to Mahomes’ first season as a starter in 2018, the Chiefs are 19-6-1 ATS as underdogs or favorites of less than three in games started by Mahomes, including a 18-8 straight up record, making them close to an automatic bet in that situation, especially in the playoffs, when they are 7-0 ATS. My calculated line of Chiefs -2.5 doesn’t give us much value with the Chiefs at -1.5, but as long as this game is expected to be close, I like the Chiefs chances of pulling out the victory. This is only a small bet for now, but I would probably increase it if Benford winds up not playing.
Kansas City Chiefs 28 Buffalo Bills 24
Pick against the spread: Kansas City -1.5
Confidence: Medium