luckadjusted

Week 13 2024 · November 29, 2024

Raiders at Chiefs, Week 13 2024: who deserved to win?

The Chiefs beat the Raiders 19–17, but it was a coin flip: replayed with the way both teams played, the Chiefs win 5 of 10. Luck ran their way: judgment calls alone were worth 8.9 points to the Chiefs.

The Chiefs won on an off day: their offense played far below its usual level. In a fresh game against the Raiders they would win 80% of the time; with this day’s form, 47%. The numbers

Before kickoff the Chiefs were 84% favorites. The biggest swing (Q4, 0:15 left): the Raiders were stopped on 3rd & 3, worth 63 points of win probability to the Chiefs.

Final

Las Vegas Raiders 17
Kansas City Chiefs 19

November 29, 2024 · GEHA Field at Arrowhead Stadium · Closing line: Chiefs −13.5

Luck index +53 Chiefs lucky · −53 Raiders

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. Raiders win 5, Chiefs win 5.

  1. 1 LV 39 KC 14
  2. 2 LV 28 KC 13
  3. 3 LV 37 KC 26
  4. 4 LV 19 KC 13
  5. 5 LV 29 KC 27
  6. 6 LV 29 KC 31
  7. 7 LV 13 KC 18
  8. 8 LV 20 KC 30
  9. 9 LV 17 KC 30
  10. 10 LV 23 KC 45

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 Chiefs won on an off day

Their offense played far below its usual level. In a fresh game against the Raiders they would win 80% of the time; with this day’s form, 47%.

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

UnitThis gameUsual levelBetter or worse than usual
Raiders offenseEPA per play gained +0.11 +0.00 better by 0.11
Raiders defenseEPA per play allowed −0.04 +0.09 better by 0.13
Chiefs offenseEPA per play gained −0.04 +0.15 worse by 0.19
Chiefs defenseEPA per play allowed +0.11 +0.05 worse by 0.06

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

Raiders win 53% of them, Chiefs 47%, counting the 5% still level after regulation as half each. The line is what actually happened: Chiefs by 2.

Show as a table
Final margin in the replaysShare of replays
Raiders by 17+13.1%
Raiders by 9–1615.3%
Raiders by 1–820.6%
Level after regulation5.3%
Chiefs by 1–819.8%
Chiefs by 9–1613.8%
Chiefs by 17+12.3%

Where the luck was

Take the luck out

The final margin was Chiefs by 2. Remove the luck, one kind at a time, and it becomes Raiders by 14.7.

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. Wright, 25 yds made · 98% expected
  • D. Carlson, 27 yds made · 98% expected
  • D. Carlson, 56 yds missed · 62% expected
  • M. Wright, 59 yds missed · 55% expected
  • M. Wright, 42 yds made · 83% expected
  • D. Carlson, 55 yds missed · 63% expected
  • M. Wright, 35 yds made · 92% expected
  • M. Wright, 32 yds made · 94% expected
  • D. Carlson, 58 yds missed · 58% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

When it happened

Chiefs’ chance of winning

As low as 40% 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 Chiefs were ahead in it, below while the Raiders were.
#WhenWhat happenedWin probability forNext drive
1 Q2 15:00 The Raiders converted 3rd & 33rd & 4th downs · 53% expected +16% LV LV: Field goal
2 Q2 6:00 D. Carlson missed 56-yard field goalKicks · 62% expected for him, 47 of 59 from 45+ before +11% KC LV: Punt
3 Q3 5:18 The Raiders were stopped on 3rd & 73rd & 4th downs · 34% expected +8% KC LV: Missed field goal
4 Q3 0:25 The Chiefs were stopped on 3rd & 113rd & 4th downs · 29% expectedD. Hopkins dropped a catchable passDrops · 6 drops on 203 catchable balls before this +10% LV KC: Punt
5 Q4 12:48 Defensive Pass Interference on the Raiders (Decamerion Richardson), 26 yardsJudgment calls · 2 flags in 231 snaps before, position avg 1 per 215 +10% KC KC: Field goal
6 Q4 10:36 The Chiefs were stopped on 3rd & 53rd & 4th downs · 36% expected +12% LV KC: Field goal
7 Q4 2:21 D. Carlson missed 58-yard field goalKicks · 58% expected for him, 47 of 61 from 45+ before +26% KC LV: Turnover
8 Q4 0:15 The Raiders were stopped on 3rd & 33rd & 4th downs · 52% expectedThe Raiders fumbled and the Chiefs recoveredFumble bounces · loose balls are close to 50/50 +63% KC –

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.

  • Jaylen Watson (KC CB), out (IR) · 0.6 pts
  • Harrison Butker (KC K), out (IR) · 0.5 pts
  • Spencer Shrader (KC K), out · 0.3 pts
  • Nate Hobbs (LV CB), out · 0.5 pts
  • Christian Wilkins (LV DT), out (IR) · 0.4 pts
  • Jakorian Bennett (LV CB), out (IR) · 0.3 pts
  • Alexander Mattison (LV RB), out · 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

Raiders 97% · Chiefs 3%

Final margin
Chiefs by 2
Luck in points
16.7 for the Chiefs
Luck-adjusted margin
Raiders by 14.7
Replay with same day's form
Raiders 53% · Chiefs 47% 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; injuries from snap counts and injury reports.

Methodology and validation · All Week 13 2024 games · Raiders · Chiefs

More from Week 13 2024