luckadjusted
NFL Week 9 · 2026

Week 7 2024 · October 21, 2024

Chargers at Cardinals, Week 7 2024: who deserved to win?

The Cardinals beat the Chargers 17–15, and the replays lean their way: with the same day's form, they win 7 of 10. The Chargers had the bounces: 3rd & 4th downs alone were worth 10 points of win probability to the Chargers.

Before kickoff it was a pick’em. The biggest swing (Q4, 4:10 left): the Chargers converted 4th & 1, worth 13 points of win probability to the Chargers.

Final

Los Angeles Chargers 15
Arizona Cardinals 17

October 21, 2024 · State Farm Stadium · Closing line: Chargers −1

Luck index +28 Cardinals lucky · −28 Chargers

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. Chargers win 3, Cardinals win 7.

  1. 1 LAC 23 ARI 6
  2. 2 LAC 17 ARI 9
  3. 3 LAC 9 ARI 6
  4. 4 LAC 14 ARI 17
  5. 5 LAC 14 ARI 19
  6. 6 LAC 16 ARI 24
  7. 7 LAC 20 ARI 31
  8. 8 LAC 10 ARI 24
  9. 9 LAC 16 ARI 34
  10. 10 LAC 0 ARI 28

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

Chargers win 28% of them, Cardinals 72%, counting the 5% still level after regulation as half each. The line is what actually happened: Cardinals by 2.

Show as a table
Final margin in the replaysShare of replays
Chargers by 17+2.7%
Chargers by 9–165.8%
Chargers by 1–816.2%
Level after regulation4.8%
Cardinals by 1–826.7%
Cardinals by 9–1622.4%
Cardinals by 17+21.5%

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 +0.1 points to the Cardinals: the final margin was Cardinals by 2, without the luck Cardinals by 1.9. Luck shares are the fitted ones (how much of each kind is luck).

The kicks

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

  • C. Dicker, 59 yds made · 67% expected
  • C. Dicker, 50 yds made · 77% expected
  • C. Dicker, 28 yds made · 99% expected
  • C. Dicker, 47 yds made · 83% expected
  • C. Dicker, 40 yds made · 91% expected
  • C. Ryland, 32 yds made · 94% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

Penalties: Chargers 5 for 57 yards, Cardinals 3 for 15 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 half toward luck; pre-snap fouls, which repeat, don’t count. How calls are valued

WhenFlagWin probability for
Q1 1:17 Illegal Contact on the Cardinals (Starling Thomas), 5 yards, wiping out the play 0% LAC +0.4 pts
Q2 8:02 Neutral Zone Infraction on the Chargers (Teair Tart), 5 yards · pre-snap +1% ARI +0.4 pts
Q2 1:52 Delay of Game on the Cardinals, 5 yards · pre-snap +3% LAC +0.4 pts
Q3 12:25 Offensive Holding on the Chargers, 10 yards +6% ARI +1.0 pts
Q3 9:40 Defensive Pass Interference on the Chargers (Cam Hart), 22 yards +7% ARI +2.6 pts
Q3 7:21 Delay of Game on the Cardinals, 5 yards · pre-snap +2% LAC +0.6 pts
Q3 4:27 False Start on the Chargers, 5 yards · pre-snap +3% ARI +0.8 pts
Q4 1:51 Unnecessary Roughness on the Chargers (Cam Hart), 15 yards +9% ARI +1.1 pts

Chargers penalties, every game · Cardinals penalties, every game · All teams, 2024

When it happened

Cardinals’ chance of winning

As low as 39% 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 Cardinals were ahead in it, below while the Chargers were.
#WhenWhat happenedWin probability forNext drive
1 Q2 10:06 The Cardinals fumbled and recovered it themselvesFumble bounces · loose balls are close to 50/50 +7% ARI ARI: Touchdown
2 Q3 9:40 Defensive Pass Interference on the Chargers (Cam Hart), 22 yardsJudgment calls · 0 flags in 131 snaps before, position avg 1 per 215 +7% ARI ARI: Turnover on downs
3 Q3 6:08 The Cardinals were stopped on 4th & 13rd & 4th downs · 77% expected +9% LAC ARI: Touchdown
4 Q3 5:15 The Chargers converted 3rd & 83rd & 4th downs · 33% expected +12% LAC LAC: Field goal
5 Q3 2:56 The Chargers converted 3rd & 73rd & 4th downs · 35% expected +7% LAC LAC: Field goal
6 Q4 4:10 The Chargers converted 4th & 13rd & 4th downs · 75% expected +13% LAC LAC: Field goal
7 Q4 2:02 The Chargers were stopped on 3rd & 43rd & 4th downs · 47% expected +9% ARI LAC: Field goal
8 Q4 1:51 Unnecessary Roughness on the Chargers (Cam Hart), 15 yardsJudgment calls · 0 flags in 131 snaps before, position avg 1 per 215 +9% ARI ARI: Field goal

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.

  • Will Hernandez (ARI G), out (IR) · 0.4 pts
  • Justin Jones (ARI DT), out (IR) · 0.3 pts
  • Matt Prater (ARI K), out (IR) · 0.3 pts
  • BJ Ojulari (ARI LB), out (IR) · 0.1 pts
  • Quentin Johnston (LAC WR), out · 0.6 pts
  • Asante Samuel Jr. (LAC CB), out (IR) · 0.5 pts
  • Hayden Hurst (LAC TE), out · 0.5 pts
  • Jordan McFadden (LAC G), out · 0.1 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

Chargers 36% · Cardinals 64%

Final margin
Cardinals by 2
Luck in points
0.1 for the Cardinals
Luck-adjusted margin
Cardinals by 1.9
Replay with same day's form
Chargers 28% · Cardinals 72% unchanged: why
How much of each is luck?

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

What counts

None by default: our tests measured no carryover after a lucky break. Slide it up to count a break for more than its own swing. 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; injuries from snap counts and injury reports.

Methodology and validation · All Week 7 2024 games · Chargers · Cardinals

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