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Buffalo Bills 33 at New England Patriots 21. Final.
Patriots -1 upsetO 43.5 ✓
The verdict · 2021 Week 16
Buffalo Bills 33, Patriots 21 — with the result never quite settled.
It turned at Q2 8:09, 2nd and 10, on Micah Hyde — 15.2 win-probability points to the Bills on one snap, the largest move of the game.
The snaps that bent it
The biggest swing of the game · Q2 8:09 · 2nd and 10
Micah Hyde
Bills
(8:09) 71-M.Onwenu reported in as eligible. 10-M.Jones pass deep middle intended for 1-N.Harry INTERCEPTED by 23-M.Hyde (54-A.Klein) at BUF 45. 23-M.Hyde pushed ob at NE 33 for 22 yards (16-J.Meyers).
Patriots closed -1 and lost outright — an upset against the closing number.
Buffalo Bills 33–21. Biggest swing: Q2 8:09, Bills +15.2% win probability on one snap.
15.2
win-probability points on one snap
The largest move of the game. The two below are drawn against it.
Mac JonesBillsQ1 14:20(14:20) (Shotgun) 10-M.Jones sacked at NE 19 for -6 yards (91-E.Oliver).
12.6pts
Stefon DiggsBillsQ2 2:15(2:15) (Shotgun) 17-J.Allen pass short middle to 14-S.Diggs to NE 11 for 23 yards (32-D.McCourty; 58-J.Collins).
10.1pts
What separated them
Third down
Bills won this one — 6 of 12 on third down, against Patriots at 1 of 10 on third down.
Billsthe gap went the way the scoreboard did
Giveaways
Bills won this one — no giveaways, against Patriots at 2 giveaways.
Billsthe gap went the way the scoreboard did
Throwing the ball
Bills won this one — +0.46 expected points per dropback, against Patriots at -0.05 expected points per dropback.
Billsthe gap went the way the scoreboard did
Red zone
Patriots owned this one and still lost it — 3 touchdowns on 3 trips, against Bills at 4 touchdowns on 7 trips.
Patriotsthe gap went the other way from the scoreboard
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 1.8 win-probability points apart on the average play, and 11 apart at the widest — with the model the more convinced about Patriots.
MarketModelmodel higher on Patriotshigher on Bills168 of 179 plays carry both curves
(8:09) 71-M.Onwenu reported in as eligible. 10-M.Jones pass deep middle intended for 1-N.Harry INTERCEPTED by 23-M.Hyde (54-A.Klein) at BUF 45. 23-M.Hyde pushed ob at NE 33 for 22 yards (16-J.Meyers).
Swing −15.2 for PatriotsExpected points −4.67 for PatriotsModel and market agree here.play 54
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
2nd · 8:09BUF +15% win prob(8:09) 71-M.Onwenu reported in as eligible. 10-M.Jones pass deep middle intended for 1-N.Harry INTERCEPTED by 23-M.Hyde (54-A.Klein) at BUF 45. 23-M.Hyde pushed ob at NE 33 for 22 yards (16-J.Meyers).
1st · 14:20BUF +13% win prob(14:20) (Shotgun) 10-M.Jones sacked at NE 19 for -6 yards (91-E.Oliver).
2nd · 2:15NE +10% win prob(2:15) (Shotgun) 17-J.Allen pass short middle to 14-S.Diggs to NE 11 for 23 yards (32-D.McCourty; 58-J.Collins).
2nd · 4:51BUF +10% win prob(4:51) (Shotgun) 17-J.Allen pass incomplete short right to 1-E.Sanders.
1st · 13:47NE +9% win prob(13:47) 7-J.Bailey punts 46 yards to BUF 35, Center-49-J.Cardona. 5-M.Stevenson ran ob at BUF 39 for 4 yards (25-B.Bolden).
3rd · 3:02NE +8% win prob(3:02) (Shotgun) 10-M.Jones pass short middle to 16-J.Meyers to BUF 3 for 7 yards (58-M.Milano).
SettledThe modelled figures are the league play-by-play model's, not ours.
How the points landed
The margin ledger
Tyler Bass's 25-yard field goal with 9:04 left in the 2nd put Buffalo Bills ahead for good. The lead never changed over the 6 scores that followed.
Bills ahead 8–1 on categories, including the biggest gap of the duel — sacks taken.
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, ±0.46 points.
Every snapexpected points added per play, all downs
+0.31Bills: +0.31 expected points added per play
+0.09Patriots: +0.09 expected points added per play
Dropping backexpected points added per dropback
+0.46Bills: +0.46 expected points added per play
−0.05Patriots: −0.05 expected points added per play
Running itexpected points added per rush
−0.00Bills: −0.00 expected points added per play
+0.30Patriots: +0.30 expected points added per play
Neither side “wins” volume or play-calling mix, so neither is drawn as a duel: Bills ran 74 snaps at a 68% dropback rate against Patriots’s 60 at 60%. Red-zone trips: Bills 7, Patriots 3.
NoteBills won the down-to-down efficiency fight: 0.31 expected points added per play vs 0.09.
Derived from the play-by-play, no model
The Read
8 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.
highest in the league that weekAgainst the weekOver Expected
BUF's pass rate over expected, +17.5 pts, was the highest of the 32 team-games charted in week 16 — 2.2 points clear of the next team along.
Past their previous high of +12.8 pts in week 8.
A 2.2-swing turn from week 15.
73 snaps this game, floor 20 — 17 of their games behind the ruler, and their own week-to-week swing is 7.1 points.
high through week 16Against their seasonFourth Down
BUF's fourth-and-short go rate, 80.0%, is past their previous high of 50.0% in week 4 — the highest of their 8 charted games through week 16.
2.3 times their own weekly swing above their number.
A 2.5-swing turn from week 15.
5 fourth-and-short calls this game, floor 3 — 9 of their games behind the ruler, and their own week-to-week swing is 18.7 points.
high through week 16Against their seasonFourth Down
NE's fourth-and-short go rate, 80.0%, is past their previous high of 66.7% in week 15 — the highest of their 8 charted games through week 16.
5 fourth-and-short calls this game, floor 3 — 8 of their games behind the ruler, and their own week-to-week swing is 31.1 points.
The season-grain rooms, pointed at this one game
Was this normal for them?
8 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 -49 pts to 37 pts
inside their normal wobble · −4.4 vs their 15.5%, and they swing ±7.1 week to week (−0.62× that swing) · 36 dropbacks
Patriots8.0%
inside their normal wobble · −5.9 vs their 13.9%, and they swing ±7.4 week to week (−0.80× 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.
NoteBUF's fourth-and-short go rate was the night's one real departure: 80.0%, 42.5 points above their season mean of 37.5% and 2.3 times their own 18.7-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.
2 players played under 8 snaps, so their shares read as a dash rather than a number. 2 lines have no expected-points read and sit 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 Patriots attack right, the Bills 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.
Bills←Patriots→
Q1Q2Q3Q2Q3Q4
M.Onwenu reported−14% win probabilitymoment 3 of 4
(8:09) 71-M.Onwenu reported in as eligible. 10-M.Jones pass deep middle intended for 1-N.Harry INTERCEPTED by 23-M.Hyde (54-A.Klein) at BUF 45. 23-M.Hyde pushed ob at NE 33 for 22 yards (16-J.Meyers).
Q2 8:09 · Patriots · 2nd & 10 at NE 33 · gained nothing · -4.67 EP · −13.6% win probability
166 snaps placed · 13 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: 179 plays across 17 drives, personnel groupings on 179 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
9 of 17 drives ended in points. The longest march was NE moving 75 yards from the NE 25 for a touchdown. Each bar is the ground a drive actually covered; NE attacks right, BUF attacks left. Hatching marks a trip inside the twenty.
Every snap
Play stream
179 of 179 plays
Team
Quarter
Down
Play type
Expected points added
Event
Charted
Plays shown
179
EPA per play
+0.15
Success rate
45%
Yards
716
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.
Bills1 RB, 1 TE, 3 WR62+0.4168%
Patriots1 RB, 1 TE, 3 WR30+0.0577%
Patriots2 RB, 1 TE, 1 WR12+0.278%
Patriots1 RB, 2 TE, 2 WR10+0.2460%
Bills2 RB, 1 TE, 2 WR5-0.4560%
Bills1 RB, 1 TE, 2 WR4——
Patriots1 RB, 1 TE, 2 WR3——
Patriots2 RB, 1 TE, 2 WR3——
Patriots2 RB, 2 TE, 0 WR2——
Bills2 RB, 1 TE, 1 WR2——
Bills2 RB, 1 TE, 0 WR1——
snapsepapass rate
179 plays · ranked by the win probability each one moved
Every play
Ball
When
Play
Only
Who
179 plays
Bar length is win probability the play moved
1st quarter35 plays
Punt5 plays
Bills6Patriots0
Bills7Patriots0
Touchdown15 plays, from the Bills 39 to the Patriots 3
The period ended14 plays, from the Patriots 25 to the Bills 29
2nd quarter53 plays
Bills7Patriots6
Bills7Patriots7
Touchdown3 plays, from the Bills 28 to the Bills 16
Bills10Patriots7
Field goal12 plays, from the Bills 25 to the Patriots 7
FormationSingle backOffense on the fieldSix linemen, one back, one tight end and two receiversDefense on the fieldFour linemen, three linebackers and four backsRoute runSlantCoverageCover 3, three deepMan or zoneZoneIn the boxEight defendersRushing the passerFourPressure (charted)The passer was kept cleanTime to throw2.3 seconds
Intercepted4 plays, from the Patriots 19 to the Patriots 33
FormationShotgunOffense on the fieldOne back, one tight end and three receiversDefense on the fieldTwo linemen, four linebackers and five backsRoute runCrosserCoverageCover 0, no safety helpMan or zoneManIn the boxEight defendersRushing the passerFivePressure (charted)The passer was pressuredTime to throw5.7 seconds
Turnover on downs7 plays, from the Patriots 33 to the Patriots 1
Punt4 plays, from the Patriots 1 to the Patriots 8
Bills16Patriots7
Bills17Patriots7
Touchdown11 plays, from the Patriots 42 to the Patriots 11
Punt8 plays, from the Patriots 25 to the Patriots 40
The period ended4 plays
3rd quarter1 plays
2nd quarter1 plays
3rd quarter38 plays
Bills20Patriots7
Field goal16 plays, from the Bills 20 to the Patriots 12
Bills20Patriots13
Bills20Patriots14
Touchdown17 plays, from the Patriots 25 to the Bills 1
The period ended5 plays, from the Bills 34 to the Bills 42
4th quarter51 plays
Bills26Patriots14
Touchdown7 plays, from the Bills 47 to the Patriots 2
Bills26Patriots20
Bills26Patriots21
Touchdown13 plays, from the Patriots 25 to the Bills 8
Bills32Patriots21
Bills33Patriots21
Touchdown17 plays, from the Bills 25 to the Patriots 2
Intercepted11 plays, from the Patriots 17 to the Bills 49
The period ended3 plays
Win probability is the league play-by-play model, 98.5% of plays · a dash means none was published