luckadjusted

Week 3 2019 · September 22, 2019

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

Broncos at Packers, Week 3 2019: who deserved to win?

The Packers beat the Broncos 27–16, but it was a coin flip: replayed with the way both teams played, the Packers win 6 of 10. Luck ran their way: fumble bounces alone were worth 3.1 points to the Packers.

Before kickoff the Packers were 70% favorites. The biggest swing (Q3, 13:50 left): the Broncos were stopped on 3rd & 2, worth 13 points of win probability to the Packers.

Final

Denver Broncos 16
Green Bay Packers 27

September 22, 2019 · Lambeau Field · Closing line: Packers −7

Luck index +43 Packers lucky · −43 Broncos

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. Broncos win 4, Packers win 6.

  1. 1 DEN 30 GB 10
  2. 2 DEN 22 GB 10
  3. 3 DEN 20 GB 13
  4. 4 DEN 13 GB 10
  5. 5 DEN 15 GB 17
  6. 6 DEN 12 GB 17
  7. 7 DEN 8 GB 17
  8. 8 DEN 23 GB 35
  9. 9 DEN 17 GB 33
  10. 10 DEN 13 GB 35

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.

How 4,000 replays ended

Broncos win 43% of them, Packers 57%, counting the 3% still level after regulation as half each. The line is what actually happened: Packers by 11.

Show as a table
Final margin in the replaysShare of replays
Broncos by 17+6.9%
Broncos by 9–1613.8%
Broncos by 1–819.5%
Level after regulation2.9%
Packers by 1–826.1%
Packers by 9–1617.0%
Packers by 17+13.9%

Where the luck was

Take the luck out

The final margin was Packers by 11. Remove the luck, one kind at a time, and it becomes Packers by 11.3.

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.

  • M. Crosby, 42 yds made · 84% expected
  • B. McManus, 30 yds made · 96% expected
  • M. Crosby, 41 yds made · 86% expected
  • M. Crosby, 45 yds missed · 80% expected
  • Extra point missed · 93% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

When it happened

Packers’ chance of winning

As low as 44% and as high as 100%. 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 Packers were ahead in it, below while the Broncos were.
#WhenWhat happenedWin probability forNext drive
1 Q1 9:33 The Packers converted 3rd & 153rd & 4th downs · 21% expected +8% GB GB: Punt
2 Q2 11:27 The Packers were stopped on 3rd & 63rd & 4th downs · 38% expected +5% DEN GB: Field goal
3 Q2 8:42 The Broncos converted 3rd & 13rd & 4th downs · 72% expected +5% DEN DEN: Field goal
4 Q2 4:08 The Broncos were stopped on 3rd & 23rd & 4th downs · 50% expected +8% GB DEN: Field goal
5 Q2 2:27 The Broncos fumbled and the Packers recoveredFumble bounces · loose balls are close to 50/50 +9% GB DEN: Punt
6 Q3 13:50 The Broncos were stopped on 3rd & 23rd & 4th downs · 59% expectedThe Broncos fumbled and the Packers recoveredFumble bounces · loose balls are close to 50/50 +13% GB DEN: Touchdown
7 Q3 6:05 The Broncos converted 4th & 13rd & 4th downs · 64% expected +7% DEN DEN: Touchdown
8 Q3 3:06 The Broncos converted 3rd & 63rd & 4th downs · 35% expected +10% DEN DEN: Turnover

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.

  • Jason Spriggs (GB T), out (IR) · 0.3 pts
  • Lane Taylor (GB G), out (IR) · 0.2 pts
  • Equanimeous St. Brown (GB WR), out (IR) · 0.2 pts
  • Raven Greene (GB FS), out (IR) · 0.2 pts
  • Tim Patrick (DEN WR), out (IR) · 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

Broncos 2% · Packers 98%

Final margin
Packers by 11
Luck in points
0.3 for the Broncos
Luck-adjusted margin
Packers by 11.3
Replay with same day's form
Broncos 43% · Packers 57% 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 3 2019 games · Broncos · Packers

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