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DYNATYZE
DYNATYZE
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Game Center
polling · 1800s tick · as of 8:24 AM ET · 16 to play
2021 Week 18 · Sat, Jan 8, 2022 · Empower Field at Mile High
Final
ChiefsKansas City28
BY 4final margin
BroncosDenver24
Kansas City Chiefs 28 at Denver Broncos 24. Final.
Chiefs -11.5 no coverO 44.5 ✓
The verdict · 2021 Week 18
Kansas City Chiefs 28, Broncos 24 — with the result never quite settled.
It turned at Q4 7:57, 2nd and 2, on Melvin Gordon — 55.7 win-probability points to the Chiefs on one snap, the largest move of the game.
The snaps that bent it
The biggest swing of the game · Q4 7:57 · 2nd and 2
Melvin Gordon
Chiefs
(7:57) 25-M.Gordon right guard to KC 13 for -4 yards (24-M.Ingram). FUMBLES (24-M.Ingram), touched at KC 13, RECOVERED by KC-54-N.Bolton at KC 14. 54-N.Bolton for 86 yards, TOUCHDOWN.
Chiefs closed -11.5, won by 4 — but didn't cover.
Kansas City Chiefs 28–24. Biggest swing: Q4 7:57, Chiefs +55.7% win probability on one snap.
55.7
win-probability points on one snap
The largest move of the game. The two below are drawn against it.
Melvin GordonBroncosQ3 9:11(9:11) 25-M.Gordon left guard for 47 yards, TOUCHDOWN.
15.4pts
Tyreek HillChiefsQ3 2:14(2:14) (Shotgun) 15-P.Mahomes pass short right to 10-T.Hill to DEN 46 for 2 yards (23-K.Fuller).
12.0pts
What separated them
Running the ball
Chiefs won this one — +0.04 expected points per carry, against Broncos at -0.31 expected points per carry.
Chiefsthe gap went the way the scoreboard did
Red zone
Chiefs won this one — 2 touchdowns on 4 trips, against Broncos at 1 touchdown on 5 trips.
Chiefsthe gap went the way the scoreboard did
Every snap
Chiefs won this one — +0.24 expected points per snap, against Broncos at +0.04 expected points per snap.
Chiefsthe gap went the way the scoreboard did
Giveaways
Chiefs won this one — no giveaways, against Broncos at 1 giveaway.
2 other measures were inside a third of the league's own spread — two clubs doing the same thing, so they are not shown.
Drawn from the weekly play-by-play file, which paints on the Monday 4:00 AM ET sync after the game.
The model against the market, the momentum underneath, every drive — scrub to replay it
How the game was won
The model and the market were 27.0 win-probability points apart on the average play, and 40 apart at the widest — with the model the more convinced about Broncos.
MarketModelmodel higher on Broncoshigher on Chiefs163 of 173 plays carry both curves
(7:57) 25-M.Gordon right guard to KC 13 for -4 yards (24-M.Ingram). FUMBLES (24-M.Ingram), touched at KC 13, RECOVERED by KC-54-N.Bolton at KC 14. 54-N.Bolton for 86 yards, TOUCHDOWN.
Swing −55.7 for BroncosExpected points −12.14 for BroncosThe model had Broncos 16 points higher than the market did.play 148
The solid line is the betting market's home win probability; the dashed line is the play-by-play model's. The shaded band between them is the disagreement — emerald where the model liked the home team more, red where it liked the away team more. Drag across the curve or use arrow keys to replay the game; gold diamonds mark the biggest swings.
Highest-leverage plays
4th · 7:57KC +56% win prob(7:57) 25-M.Gordon right guard to KC 13 for -4 yards (24-M.Ingram). FUMBLES (24-M.Ingram), touched at KC 13, RECOVERED by KC-54-N.Bolton at KC 14. 54-N.Bolton for 86 yards, TOUCHDOWN.
3rd · 9:11DEN +15% win prob(9:11) 25-M.Gordon left guard for 47 yards, TOUCHDOWN.
3rd · 2:14DEN +12% win prob(2:14) (Shotgun) 15-P.Mahomes pass short right to 10-T.Hill to DEN 46 for 2 yards (23-K.Fuller).
2nd · 7:57DEN +9% win prob(7:57) (Shotgun) 3-D.Lock scrambles up the middle for 23 yards, TOUCHDOWN.
4th · 6:06DEN +8% win prob(6:06) (Shotgun) 3-D.Lock pass deep left to 10-J.Jeudy pushed ob at KC 14 for 28 yards (21-M.Hughes).
2nd · 13:19KC +7% win prob(13:19) (Shotgun) 15-P.Mahomes sacked at KC 42 for -15 yards (96-S.Harris). Penalty on KC-62-J.Thuney, Offensive Holding, declined.
SettledThe modelled figures are the league play-by-play model's, not ours.
How the points landed
The margin ledger
Nick Bolton's 86-yard touchdown with 7:57 left in the 4th put Kansas City Chiefs ahead for good. The lead never changed over the 1 score that followed.
Lead
1st6:13Travis Kelce·3-yd TD catch3-yard touchdown catchfrom Patrick Mahomesfrom Patrick Mahomes+77–0
4th14:49Harrison Butker·51-yd field goal51-yard field goalholder T.Townsend · snap J.Winchester+320–21
4th7:57Nick Bolton·86-yd defence TD86-yard touchdownthe defence scored itthe defence scored it · two-point goodLead never changed again+828–21
4th4:41Brandon McManus·31-yd field goal31-yard field goalholder S.Martin · snap J.Bobenmoyer+328–24
9 scores · bar length is the lead after each one
Down-to-down truth
Situational splits
Chiefscategory by categoryBroncos
Chiefs6–2Broncos
396Total yards364
5.5Yards per play6.7
51%Success rate48%
62%Third-down rate58%
2Red-zone touchdowns1
6Explosive plays7
26First downs17
1Sacks taken1
0Turnovers1
The read
Chiefs ahead 6–2 on categories, including the biggest gap of the duel — turnovers.
Expected points added, per play
The centre line is an average play. A bar to the right of it is a side that gained more than the situation was worth; a bar to the left is a side that lost ground. All six bars share one scale, ±0.35 points.
Every snapexpected points added per play, all downs
+0.24Chiefs: +0.24 expected points added per play
+0.04Broncos: +0.04 expected points added per play
Dropping backexpected points added per dropback
+0.33Chiefs: +0.33 expected points added per play
+0.32Broncos: +0.32 expected points added per play
Running itexpected points added per rush
+0.04Chiefs: +0.04 expected points added per play
−0.31Broncos: −0.31 expected points added per play
Neither side “wins” volume or play-calling mix, so neither is drawn as a duel: Chiefs ran 72 snaps at a 69% dropback rate against Broncos’s 54 at 56%. Red-zone trips: Chiefs 4, Broncos 5.
NoteChiefs won the down-to-down efficiency fight: 0.24 expected points added per play vs 0.04.
Derived from the play-by-play, no model
The Read
6 of 8 readings cleared their snap floor and were tested against four comparisons: this week's whole slate, the team's own season, the week before, and the team's own ordinary spread. Every bar below is set in that team's own week-to-week swing, never in league points — one team's swing runs 1.6 to 3.1 times the entire league's spread.
KC's sack or hit rate turned over: 22.2% in week 17 against 6.7% here — they got home then and stayed blocked now, a turn of 2.9 of their own weekly swings across the two.
30 dropbacks this game, floor 12 — 17 of their games behind the ruler, and their own week-to-week swing is 5.4 points.
The season-grain rooms, pointed at this one game
Was this normal for them?
6 of 8 readings cleared their snap floor. Every deviation below is measured in that team's own game-to-game swing, not in league points — because one game's swing runs from 1.6 to 3.1 times the whole league's spread.
their week-to-week swingall 32 teams
upper band = their week-to-week swing · lower rule = all 32 teams · scale -20 pts to 25 pts
leaned — stayed blocked · −6.0 vs their 12.7%, and they swing ±5.4 week to week (−1.11× that swing) · 30 dropbacks
Broncos10.0%
inside their normal wobble · −2.9 vs their 12.9%, and they swing ±4.6 week to week (−0.64× that swing) · 50 dropbacks
Play-action rate
Charted from 2022. The columns exist for 2021 and are entirely empty, which is not a season of data.
Blitz rate sent
Charted from 2022. The columns exist for 2021 and are entirely empty, which is not a season of data.
NoteKC's sack or hit rate was the night's one real departure: 6.7%, 6.0 points below their season mean of 12.7% and 1.1 times their own 5.4-point weekly swing.
The Game Day Roster
Who was out, who dressed and never took a snap, and who was on the field how much. Game-day list and snap counts from the weekly roster and snap feeds. Practice-squad and injured-reserve players are not shown — they were never on the game-day list.
Kansas City Chiefs
48 dressed · 4 inactive · 3 never used
77Andrew WylieG · Every snap100%78 snaps
52Creed HumphreyC · Every snap100%78 snaps
65Trey SmithG · Every snap100%78 snaps
62Joe ThuneyG · Every snap100%78 snaps
57Orlando BrownT · Every snap100%78 snaps
15Patrick MahomesQB · Every snap100%78 snaps
17Mecole HardmanWR · Full-time83%65 snaps
87Travis KelceTE · Heavy rotation77%60 snaps
13Byron PringleWR · Heavy rotation71%55 snaps
11Demarcus RobinsonWR · Heavy rotation53%41 snaps
31Darrel WilliamsRB · Rotational40%31 snaps
40Derrick GoreRB · Rotational31%24 snaps
1Jerick McKinnonRB · Rotational29%23 snaps
81Blake BellTE · Rotational27%21 snaps
19Josh GordonWR · Rotational27%21 snaps
83Noah GrayTE · Situational23%18 snaps
10Tyreek HillWR · Situational18%14 snaps
85Marcus KempWR · Situational13%10 snaps
45Michael BurtonFB · Situational8%6 snaps
73Nick AllegrettiG · Situational1%1 snap
Inactive · 4
Deandre BakerCBShane BuecheleQBClyde Edwards-HelaireRBPrince Tega WanoghoT
1 line has no expected-points read and sits off the plane.
Expected points are modelled in full PPR, so the “vs expected” column stays in that unit whichever format the pills are set to. Switching the pills changes the points column, not the plane.
The field map
Every snap, where it happened
The whole game as one hundred yards. The Broncos attack right, the Chiefs attack left, so a change of possession is a reversal you can see. Reading down is the order the snaps were played — not the clock, so a two-minute drill gets the same room as any other fourteen snaps. This game is final.
Chiefs←Broncos→
Q1Q2Q3Q4
M.Gordon right−61% win probabilitymoment 3 of 4
(7:57) 25-M.Gordon right guard to KC 13 for -4 yards (24-M.Ingram). FUMBLES (24-M.Ingram), touched at KC 13, RECOVERED by KC-54-N.Bolton at KC 14. 54-N.Bolton for 86 yards, TOUCHDOWN.
Q4 7:57 · Broncos · 2nd & 2 at KC 9 · lost 4 · -12.14 EP · −61.1% win probability
161 snaps placed · 12 without a recorded yard line, left off the map · 4 marked moments — the largest win-probability swings, one per drive.
The Film Room · post-game
Post-game film: 173 plays across 16 drives, personnel groupings on 173 snaps. Everything here paints once the weekly sync ingests the game — there is no live play-level feed in this product, so nothing on this page updates while a game is being played.
Possession by possession
The field rail
8 of 16 drives ended in points. The longest march was KC moving 91 yards from the KC 9 for a touchdown. Each bar is the ground a drive actually covered; DEN attacks right, KC attacks left. Hatching marks a trip inside the twenty.
Every snap
Play stream
173 of 173 plays
Team
Quarter
Down
Play type
Expected points added
Event
Charted
Plays shown
173
EPA per play
+0.11
Success rate
44%
Yards
756
Who was on the field
Personnel groupings
Offensive grouping on every pass and run. A group needs five snaps in this game before it gets a number — under that the sample is a coin flip and the cell reads a dash instead. The names of the eleven on the field are only recorded from 2023 onward, so this game gives the grouping without the roster.
Chiefs1 RB, 1 TE, 3 WR54+0.2674%
Broncos1 RB, 1 TE, 3 WR33+0.3252%
Chiefs1 RB, 2 TE, 2 WR12+0.2542%
Broncos1 RB, 2 TE, 2 WR10+0.2440%
Broncos1 RB, 3 TE, 1 WR9-1.3033%
Chiefs1 RB, 3 TE, 1 WR3——
Chiefs2 RB, 1 TE, 2 WR2——
Broncos2 RB, 1 TE, 2 WR2——
Chiefs2 RB, 1 TE, 1 WR1——
snapsepapass rate
173 plays · ranked by the win probability each one moved
Every play
Ball
When
Play
Only
Who
173 plays
Bar length is win probability the play moved
1st quarter43 plays
Punt5 plays, from the Broncos 25 to the Broncos 31
Chiefs6Broncos0
Chiefs7Broncos0
Touchdown19 plays, from the Chiefs 9 to the Broncos 3
Chiefs7Broncos6
Chiefs7Broncos7
Touchdown15 plays, from the Broncos 33 to the Chiefs 5
The period ended3 plays
2nd quarter47 plays
Punt6 plays, from the Chiefs 28 to the Broncos 43
Chiefs7Broncos13
Chiefs7Broncos14
Touchdown9 plays, from the Broncos 20 to the Chiefs 23
Chiefs10Broncos14
Field goal16 plays, from the Chiefs 25 to the Broncos 6
Punt9 plays, from the Broncos 25 to the Broncos 41
The period ended7 plays, from the Chiefs 15 to the Chiefs 28
3rd quarter42 plays
FormationShotgunOffense on the fieldOne back, one tight end and three receiversDefense on the fieldTwo linemen, three linebackers and six backsRoute runFlatCoverageCover 4, quartersMan or zoneZoneIn the boxFive defendersRushing the passerFourPressure (charted)The passer was kept cleanTime to throw2.4 seconds
Chiefs16Broncos14
Chiefs17Broncos14
Touchdown11 plays, from the Chiefs 25 to the Broncos 14
FormationShotgunOffense on the fieldOne back, one tight end and three receiversDefense on the fieldThree linemen, two linebackers and six backsRoute runGoCoverageCover 2, two deepMan or zoneZoneIn the boxSeven defendersRushing the passerFourPressure (charted)The passer was kept cleanTime to throw2.7 seconds
FormationSingle backOffense on the fieldOne back, two tight ends and two receiversDefense on the fieldThree linemen, four linebackers and four backsIn the boxSeven defenders
Chiefs17Broncos20
Chiefs17Broncos21
Touchdown7 plays, from the Broncos 25 to the Chiefs 47
Punt10 plays, from the Chiefs 25 to the Broncos 43
Punt5 plays, from the Broncos 20 to the Broncos 21
The period ended9 plays, from the Chiefs 43 to the Broncos 36
4th quarter41 plays
Chiefs20Broncos21
Field goal3 plays
FormationSingle backOffense on the fieldOne back, three tight ends and one receiverDefense on the fieldThree linemen, four linebackers and four backsIn the boxNine defenders
Chiefs26Broncos21
Touchdown13 plays, from the Broncos 25 to the Chiefs 9
Chiefs28Broncos21
FormationShotgunOffense on the fieldOne back, one tight end and three receiversDefense on the fieldThree linemen, two linebackers and six backsRoute runGoCoverageCover 4, quartersMan or zoneZoneIn the boxSeven defendersRushing the passerFivePressure (charted)The passer was kept cleanTime to throw2.2 seconds
Chiefs28Broncos24
Field goal9 plays, from the Broncos 25 to the Chiefs 13
The period ended15 plays, from the Chiefs 25 to the Broncos 5
Win probability is the league play-by-play model, 98.5% of plays · a dash means none was published