2021 · WC

Final

Steelers

Pittsburgh

QB Ben Roethlisberger

21·42

Chiefs

Kansas City

QB Patrick Mahomes

GEHA Field at Arrowhead Stadium · outdoors · grass · 30°F · wind 8mph

Closing spread

KC -13

Total

46

Model margin

+4.0est.

KC perspective

Push chance

1.7%est.

Win probability

  • Chiefs
  • Steelers

How each play moved the game.

Chiefs winsSteelers wins

Matchup

Where the edges are

Season-long league percentiles for both sides, mirrored. The saturated side of a lopsided row holds the edge.

Steelersedge mapChiefs
  • -0.051EPA / play+0.140
  • 40.2%Success rate51.1%
  • -0.037EPA / dropback+0.216
  • -0.078EPA / rush-0.024
  • 7.1%Explosive rate8.3%
  • -2.66CPOE+2.81
  • 39.0%Third-down rate52.1%
  • 60.3%Red-zone TD rate60.0%
  • 1.65Points / drive2.66
  • 1.7%Turnover rate2.0%

Bar length is league percentile, already oriented so longer is better. The saturated side of a lopsided row holds the edge; rows within ~12 points are washed as even.

The rivalry

All square 8–8 since 1999

KC have won 4 straight. Meetings average 45.3 points. KC are 10-6 ATS in the series.

Previous meetings
SeasonMatchupScoreWinner
2024 · W17KC @ PIT2910KC
2021 · W16PIT @ KC1036KC
2018 · W2KC @ PIT4237KC
2017 · W6PIT @ KC1913PIT
2016 · playoffsPIT @ KC1816PIT
2016 · W4KC @ PIT1443PIT
2015 · W7PIT @ KC1323KC
2014 · W16KC @ PIT1220PIT

Box score

Individual performances

Steelers

Passing

PlayerC/AttYdsTDINT
Ben Roethlisberger29/4421520

Rushing

PlayerCarYdsAvgTD
Najee Harris12292.40
Benny Snell2157.50
Kalen Ballage4133.30
Ben Roethlisberger2-1-0.50

Chiefs

Passing

PlayerC/AttYdsTDINT
Patrick Mahomes30/3940451
Travis Kelce1/1210

Rushing

PlayerCarYdsAvgTD
Jerick McKinnon12615.10
Patrick Mahomes3299.70
Mecole Hardman263.00
Darrel Williams144.00
Derrick Gore331.00

Where this game is likely to land

  • Model
  • Smooth (normal)
  • Betting line

Probability of each final margin. Football scoring clusters — the spikes at 3 and 7 are real, and a smooth model misses them.

line +137.5%3.2%4.9%3.2%2.9%

Positive margins favour Chiefs; negative favour Steelers.

Half-point at risk

1.73%

outcomes that flip if the line moves 0.5

Model home win

59.8%

Expected total

45.8est.

Model

Where the number comes from

Each component is additive, in points of expected margin.

  • Team ratings (opponent-adjusted EPA)+2.22
  • Home-field advantage+1.71
  • Quarterback adjustment0.00
  • Rest differential+0.08
  • Expected margin+4.01