luckadjusted

Week 6 2023 · October 15, 2023

Colts at Jaguars, Week 6 2023: who deserved to win?

The Jaguars beat the Colts 37–20, and it was no fluke: replayed with the way both teams actually played, the Jaguars win 8 of 10.

Before kickoff the Jaguars were 62% favorites. The biggest swing (Q1, 9:51 left): the Colts converted 4th & 1, worth 11 points of win probability to the Colts.

Final

Indianapolis Colts 20
Jacksonville Jaguars 37

October 15, 2023 · TIAA Bank Stadium · Closing line: Jaguars −4

Luck index +17 Jaguars about even · −17 Colts

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. Colts win 2, Jaguars win 8.

  1. 1 IND 36 JAX 21
  2. 2 IND 15 JAX 10
  3. 3 IND 31 JAX 34
  4. 4 IND 24 JAX 30
  5. 5 IND 14 JAX 23
  6. 6 IND 17 JAX 30
  7. 7 IND 17 JAX 33
  8. 8 IND 17 JAX 37
  9. 9 IND 14 JAX 38
  10. 10 IND 14 JAX 46

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

Colts win 17% of them, Jaguars 83%, counting the 2% still level after regulation as half each. The line is what actually happened: Jaguars by 17.

Show as a table
Final margin in the replaysShare of replays
Colts by 17+1.7%
Colts by 9–163.9%
Colts by 1–89.4%
Level after regulation1.9%
Jaguars by 1–817.0%
Jaguars by 9–1621.9%
Jaguars by 17+44.1%

Where the luck was

Take the luck out

The final margin was Jaguars by 17. Remove the luck, one kind at a time, and it becomes Jaguars by 5.9.

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. Gay, 28 yds made · 98% expected
  • M. Gay, 56 yds made · 63% expected
  • B. McManus, 48 yds made · 76% expected
  • B. McManus, 49 yds made · 74% expected
  • B. McManus, 51 yds made · 71% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

When it happened

Jaguars’ chance of winning

As low as 42% 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 Jaguars were ahead in it, below while the Colts were.
#WhenWhat happenedWin probability forNext drive
1 Q1 9:51 The Colts converted 4th & 13rd & 4th downs · 68% expected +11% IND IND: Field goal
2 Q1 6:38 The Colts were stopped on 3rd & 53rd & 4th downs · 28% expected +5% JAX IND: Field goal
3 Q1 3:21 The Jaguars converted 4th & 13rd & 4th downs · 72% expected +9% JAX JAX: Touchdown
4 Q1 1:38 Neutral Zone Infraction on the Colts (DeForest Buckner), 5 yardsPre-snap flags · 10 flags in 4204 snaps before, position avg 1 per 316 +5% JAX JAX: Touchdown
5 Q2 14:17 The Colts fumbled and the Jaguars recoveredFumble bounces · loose balls are close to 50/50 +5% JAX IND: Punt
6 Q2 13:20 Defensive Offside on the Jaguars (Travon Walker), 5 yards, wiping out the playPre-snap flags · 7 flags in 1252 snaps before, position avg 1 per 444 +8% IND IND: Punt
7 Q2 5:28 The Colts converted 3rd & 53rd & 4th downs · 35% expected +5% IND IND: Turnover
8 Q2 4:54 The Colts got away with an interception-worthy throwInterceptions · 44% expected to stay out of the defense's hands +4% IND IND: 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.

  • Walker Little (JAX T), out · 0.5 pts
  • Zay Jones (JAX WR), out · 0.5 pts
  • Braden Smith (IND T), out · 1.0 pts
  • Dallis Flowers (IND CB), out (IR) · 0.6 pts
  • Jelani Woods (IND TE), 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

Colts 15% · Jaguars 85%

Final margin
Jaguars by 17
Luck in points
11.1 for the Jaguars
Luck-adjusted margin
Jaguars by 5.9
Replay with same day's form
Colts 17% · Jaguars 83% 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 6 2023 games · Colts · Jaguars

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