luckadjusted

Week 15 2019 · December 15, 2019

No FTN charting for this game (drops and interception-worthy throws are not modelled).

Patriots at Bengals, Week 15 2019: who deserved to win?

The Patriots beat the Bengals 34–13, but the Bengals played well enough to win it: they take 6 of 10 replays with the same day's form. Luck ran their way: fumble bounces alone were worth 3.1 points to the Patriots.

The Patriots won on an off day: they played far below what the matchup promised. In a fresh game against the Bengals they would win 79% of the time; with this day’s form, 38%. The numbers

Before kickoff the Patriots were 78% favorites. The biggest swing (Q3, 7:32 left): Return touchdown by the Patriots, worth 17 points of win probability to the Patriots.

Final

New England Patriots 34
Cincinnati Bengals 13

December 15, 2019 · Paul Brown Stadium · Closing line: Patriots −10.5

Luck index +62 Patriots very lucky · −62 Bengals

Each team’s own plays from this game, resampled into new drives 4,000 times: with the way both teams actually played, how often does this performance win? How the replay works

Ten replays. Patriots win 4, Bengals win 6.

  1. 1 NE 22 CIN 6
  2. 2 NE 47 CIN 37
  3. 3 NE 26 CIN 20
  4. 4 NE 23 CIN 20
  5. 5 NE 26 CIN 27
  6. 6 NE 28 CIN 33
  7. 7 NE 9 CIN 17
  8. 8 NE 15 CIN 26
  9. 9 NE 7 CIN 23
  10. 10 NE 6 CIN 30

Three other ways to ask

Each answers a different question, so none of them replaces the replay above.

The closing betting line, turned into a probability. What everyone knew before the game.

The line plus what this game showed, weighted by how much one game can tell. It stays close to the line because one game says little.

Every kick, fumble bounce, drop, conversion and judgment call redrawn; everything else fixed. The narrowest view of luck.

The Patriots won on an off day

They played far below what the matchup promised. In a fresh game against the Bengals they would win 79% of the time; with this day’s form, 38%.

41 points apart for the Patriots: the gap is how differently this game went from what the two teams usually are.

UnitThis gameUsual levelBetter or worse than usual
Patriots offenseEPA per play gained +0.07 +0.12 worse by 0.04
Patriots defenseEPA per play allowed +0.10 +0.04 worse by 0.07
Bengals offenseEPA per play gained +0.10 +0.04 better by 0.06
Bengals defenseEPA per play allowed +0.07 +0.19 better by 0.12

EPA (expected points added) per play on competitive snaps, turnovers left out because they are valued as luck. Usual level: the team’s earlier games this season plus half of last season, pulled toward the league average. One team’s defense and the other team’s offense are the same snaps, so one game can’t fully say whose day it was; it shows how far this one was from both teams’ norms.

How 4,000 replays ended

Patriots win 38% of them, Bengals 62%, counting the 4% still level after regulation as half each. The line is what actually happened: Patriots by 21.

Show as a table
Final margin in the replaysShare of replays
Patriots by 17+6.2%
Patriots by 9–1612.1%
Patriots by 1–819.0%
Level after regulation3.5%
Bengals by 1–827.3%
Bengals by 9–1617.3%
Bengals by 17+14.6%

Where the luck was

Take the luck out

The final margin was Patriots by 21. Remove the luck, one kind at a time, and it becomes Patriots by 13.5.

Each row takes one kind of luck out of the margin. Color shows which team it helped. Luck shares are the fitted ones (how much of each component is luck).

The kicks

How likely each kicker was to make that kick (his own record, the distance and the weather), and what happened.

  • R. Bullock, 34 yds made · 92% expected
  • N. Folk, 40 yds made · 85% expected
  • N. Folk, 46 yds made · 73% expected
  • R. Bullock, 48 yds made · 69% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

When it happened

Bengals’ chance of winning

As low as 0% and as high as 77%. Numbers mark the biggest luck moments, listed below.

nflfastR’s in-game win probability. It ignores the betting line, so it starts near even. Shaded above the middle while the Bengals were ahead in it, below while the Patriots were.
#WhenWhat happenedWin probability forNext drive
1 Q1 11:52 The Patriots converted 3rd & 103rd & 4th downs · 28% expected +9% NE NE: Touchdown
2 Q1 6:17 The Bengals converted 3rd & 33rd & 4th downs · 40% expected +8% CIN CIN: Touchdown
3 Q2 11:24 The Patriots were stopped on 4th & 43rd & 4th downs · 46% expected +8% CIN NE: Field goal
4 Q2 1:45 The Bengals fumbled and the Patriots recoveredFumble bounces · loose balls are close to 50/50 +11% NE CIN: End of half
5 Q2 0:54 The Patriots were stopped on 3rd & 83rd & 4th downs · 32% expected +8% CIN NE: Field goal
6 Q3 14:21 The Bengals were stopped on 3rd & 63rd & 4th downs · 33% expected +7% NE CIN: Opp touchdown
7 Q3 11:23 The Patriots converted 3rd & 73rd & 4th downs · 27% expected +7% NE NE: Touchdown
8 Q3 7:32 Return touchdown by the PatriotsSpecial teams +17% NE NE: Opp touchdown

Missing players

Key players (usually on the field for half the snaps or more) who missed this game or part of it, valued by position and quality. The same players are missing in every replay, so this counts as luck in points only.

  • Auden Tate (CIN WR), out (IR) · 0.4 pts
  • John Jerry (CIN G), out · 0.4 pts
  • Alex Redmond (CIN G), out (IR) · 0.3 pts
  • Jason McCourty (NE CB), out · 0.5 pts

Adjust the assumptions

Disagree with how much of a fumble bounce or a pass interference call is luck? Change it and the coin-flip replay reruns in your browser.

Only coin-flips re-rolled

Patriots 99% · Bengals 1%

Final margin
Patriots by 21
Luck in points
7.5 for the Patriots
Luck-adjusted margin
Patriots by 13.5
Replay with same day's form
Patriots 38% · Bengals 62% unchanged: why
How much of each is luck?

0% treats it as skill, 100% as pure luck. The tick is our fit.

What counts

We tested momentum on 19,000 lucky breaks and found none, so it's off by default. Why

Flip a play

Force the other outcome, in this game and in every replay: a made kick becomes a miss, a stop becomes a conversion, a flag goes the other way.

About these numbers

Play-by-play and win probability from nflfastR via nflverse; kicks valued against each kicker’s own record; drops and interception-worthy throws from FTN charting (not available for this game); injuries from snap counts and injury reports. No FTN charting for this game (drops and interception-worthy throws are not modelled).

Methodology and validation · All Week 15 2019 games · Patriots · Bengals

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