luckadjusted

Week 3 2019 · September 22, 2019

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

Saints at Seahawks, Week 3 2019: who deserved to win?

The Saints beat the Seahawks 33–27 and were the better team on the day: replayed with the same form, they win 7 of 10.

Before kickoff the Seahawks were 64% favorites. The biggest swing (Q2, 7:05 left): Return touchdown by the Saints, worth 28 points of win probability to the Saints.

Final

New Orleans Saints 33
Seattle Seahawks 27

September 22, 2019 · CenturyLink Field · Closing line: Seahawks −5

Luck index +31 Saints lucky · −31 Seahawks

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. Saints win 7, Seahawks win 3.

  1. 1 NO 33 SEA 7
  2. 2 NO 38 SEA 20
  3. 3 NO 24 SEA 10
  4. 4 NO 27 SEA 16
  5. 5 NO 24 SEA 17
  6. 6 NO 34 SEA 30
  7. 7 NO 26 SEA 24
  8. 8 NO 21 SEA 23
  9. 9 NO 3 SEA 10
  10. 10 NO 14 SEA 31

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

Saints win 69% of them, Seahawks 31%, counting the 4% still level after regulation as half each. The line is what actually happened: Saints by 6.

Show as a table
Final margin in the replaysShare of replays
Saints by 17+21.4%
Saints by 9–1621.6%
Saints by 1–825.7%
Level after regulation3.9%
Seahawks by 1–815.7%
Seahawks by 9–167.5%
Seahawks by 17+4.3%

Where the luck was

What the luck was worth

Every lucky and unlucky play, weighted by the moment it happened: its swing in win probability, added up by kind. A missed kick in a decided game counts for nothing; the same kick at the end of a tie game can be most of a win.

Swings add up across a game, so in one that went back and forth they can pass 100%. On the scoreboard the same luck was worth +5.4 points to the Seahawks: the final margin was Saints by 6, without the luck Saints by 11.4. Luck shares are the fitted ones (how much of each kind is luck).

Penalties: Saints 11 for 70 yards, Seahawks 7 for 53 yards

Every accepted flag, in order, and what it did to the helped team’s chance of winning at that moment, including any play it wiped out (points on the scoreboard in grey). A flag in a decided game is worth nothing; one at the turn of a close game can be worth most of a win. Judgment calls count toward luck, pre-snap fouls mostly don’t. How calls are valued

WhenFlagWin probability for
Q1 15:00 Illegal Block Above the Waist on the Seahawks (Will Dissly), 10 yards +2% NO +1.3 pts
Q1 12:30 False Start on the Seahawks (Ben Burr-Kirven), 5 yards · pre-snap +1% NO +0.2 pts
Q1 7:31 False Start on the Saints, 5 yards · pre-snap +2% SEA +1.1 pts
Q1 7:02 Illegal Shift on the Saints, 5 yards, wiping out the play · pre-snap +6% SEA +2.0 pts
Q1 0:57 Offensive Holding on the Saints, 10 yards +1% SEA +0.8 pts
Q1 0:30 False Start on the Saints, 5 yards · pre-snap +2% SEA +0.3 pts
Q2 6:16 False Start on the Seahawks (Will Dissly), 5 yards · pre-snap +2% NO +0.6 pts
Q3 12:57 Chop Block on the Saints (Alvin Kamara), 15 yards, wiping out the play +4% SEA +2.8 pts
Q3 11:14 Illegal Formation on the Seahawks (Al Woods), 5 yards · pre-snap +3% NO +2.6 pts
Q3 7:44 Offensive Holding on the Seahawks, 10 yards, wiping out the play +2% NO +2.0 pts
Q3 6:00 Unsportsmanlike Conduct on the Seahawks, 15 yards +1% NO +1.4 pts
Q3 5:06 Defensive Holding on the Saints (P.J. Williams), 5 yards +1% SEA +1.7 pts
Q3 2:47 Offensive Holding on the Saints (Josh Hill), 6 yards, wiping out the play +1% SEA +2.7 pts
Q4 13:35 Defensive Offside on the Saints (Trey Hendrickson), 5 yards · pre-snap 0% SEA +0.9 pts
Q4 4:27 Defensive Pass Interference on the Seahawks (K.J. Wright), 3 yards 0% NO +2.0 pts
Q4 0:30 Defensive Offside on the Saints (Cameron Jordan), 5 yards, wiping out the play · pre-snap +2% SEA +4.0 pts
Q4 0:12 Defensive Holding on the Saints (Vonn Bell), 5 yards 0% SEA +0.1 pts
Q4 0:05 Illegal Use of Hands on the Saints (David Onyemata), 4 yards, wiping out the play +1% SEA +3.6 pts

Saints penalties, every game · Seahawks penalties, every game · All teams, 2019

When it happened

Seahawks’ chance of winning

As low as 0% and as high as 55%. 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 Seahawks were ahead in it, below while the Saints were.
#WhenWhat happenedWin probability forNext drive
1 Q1 12:19 Return touchdown by the SaintsSpecial teams +12% NO NO: Opp touchdown
2 Q1 10:53 The Seahawks converted 3rd & 93rd & 4th downs · 30% expected +7% SEA SEA: Punt
3 Q1 7:02 Illegal Shift on the Saints, 5 yards, wiping out the playPre-snap flags +6% SEA SEA: Touchdown
4 Q1 4:36 The Seahawks converted 3rd & 53rd & 4th downs · 42% expected +8% SEA SEA: Touchdown
5 Q2 7:05 The Seahawks fumbled and the Saints recoveredFumble bounces · loose balls are close to 50/50Return touchdown by the SaintsSpecial teams +28% NO SEA: Turnover on downs
6 Q2 5:26 The Seahawks converted 3rd & 103rd & 4th downs · 28% expected +6% SEA SEA: Turnover on downs
7 Q2 3:21 The Seahawks were stopped on 3rd & 13rd & 4th downs · 75% expected +5% NO SEA: Turnover on downs
8 Q2 2:37 The Seahawks were stopped on 4th & 13rd & 4th downs · 74% expected +10% NO SEA: End of half

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.

  • Ed Dickson (SEA TE), out (IR) · 0.3 pts
  • Tedric Thompson (SEA FS), out · 0.3 pts
  • Jordan Simmons (SEA G), out (IR) · 0.2 pts
  • Drew Brees (NO QB), out, replaced by t.bridgewater · 1.5 pts
  • Tre'Quan Smith (NO WR), out · 0.3 pts
  • Sheldon Rankins (NO DT), out · 0.3 pts
  • Alex Anzalone (NO LB), out (IR) · 0.2 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

Saints 91% · Seahawks 9%

Final margin
Saints by 6
Luck in points
5.4 for the Seahawks
Luck-adjusted margin
Saints by 11.4
Replay with same day's form
Saints 69% · Seahawks 31% 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 · Saints · Seahawks

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