Hailey
In the Josh Allen–Patrick Mahomes era, the narrative is clear: the Buffalo Bills continue to dominate the Kansas City Chiefs in the regular season.
With Buffalo’s 28-21 win in November 2025, the Bills extended their regular-season streak to five straight over Kansas City — from 2021 through 2025.
That run contributes to an overall regular-season advantage of 29-21-1 for Buffalo in the series.
Recent Results: Bills’ Five-Game Regular-Season Streak
Since 2021, Buffalo has delivered wins of 38-20 (2021), 24-20 (2022), 20-17 (2023), 30-21 (2024), and 28-21 (2025) in their regular-season matchups with Kansas City.
Three of those five wins came at Kansas City’s home stadium, showing Buffalo’s ability to win in hostile environments.
The Bigger Picture: Regular Season vs Playoffs
Historically, Buffalo leads the overall series 31-26-1 and holds the 29-21-1 regular-season edge. However, in the postseason the Chiefs hold a commanding advantage (5-2 in playoff meetings).
This split shows the rivalry’s yin and yang: Bills dominate in autumn, Chiefs tend to take over in January.
Why Buffalo Keeps Beating KC Before January
1) Matchup leverage on defense. Buffalo repeatedly limits Mahomes’ big-play ability, forces him into tighter windows, and makes game-defining stops late in the game.
2) Josh Allen’s dual-threat pressure. Allen’s ability to pass and run has created strategic stress for Kansas City’s defense in those regular-season games—particularly on third-downs, red-zone chances and four-minute finishes.
3) Coaching adjustments. Buffalo’s schemes in those matchups have been better calibrated: from early shots in 2021 to more controlled, balanced scripts in 2024 and 2025.
Key Takeaways for 2025
- Regular season belongs to Buffalo: Five straight wins from 2021–2025 underscore the Bills’ matchup advantage outside the playoffs.
- Playoffs still run through KC: Despite autumn dominance, the Chiefs’ January edge (including recent AFC title wins) keeps their Lombardi path aligned.
- Series context: Bills lead the rivalry overall and in the regular season, but the Chiefs lead in the postseason.
Bills-Chiefs- Regular-Season Results (Allen–Mahomes Era)
| Season | Date | Venue | Result | Notes |
|---|---|---|---|---|
| 2021 | Oct 10 | Arrowhead | Bills 38-20 | Statement win |
| 2022 | Oct 16 | Arrowhead | Bills 24-20 | Late defensive stand |
| 2023 | Dec 10 | Arrowhead | Bills 20-17 | Close win, Chiefs nearly came back |
| 2024 | Nov 17 | Highmark | Bills 30-21 | Buffalo controls tempo |
| 2025 | Nov 2 | Highmark | Bills 28-21 | Fifth straight regular-season win |
The regular-season storyline is unmistakable: the Buffalo Bills have consistently out-executed the Kansas City Chiefs from 2021 through 2025 in head-to-head autumn matchups, stacking five straight wins and expanding their regular-season advantage to 29-21-1.
Yet the ultimate hurdle remains January, where Patrick Mahomes and the Chiefs have delivered again and again.
Until Buffalo flips that postseason script, the narrative will remain: Bills in autumn, Chiefs in the playoffs.