luckadjusted
CFB Week 4 · 2026

Week 8 2025 · October 18, 2025

Part of this game's play-by-play is missing from the source: the plays on file account for 17 of the 32 points, so the replay rests on the plays there are.

Southern Miss at Louisiana, Week 8 2025: who deserved to win?

Southern Miss beat Louisiana 22–10, but the replays lean toward Louisiana: it takes 7 of 10 with the same day's form.

Before kickoff Southern Miss was a 61% favorite. The biggest swing (Q3, 3:40 left): Sideline Interference on Louisiana, 15 yards, worth 8 points of win probability to Louisiana.

Final

Southern Miss Golden Eagles 22
Louisiana Ragin' Cajuns 10

October 18, 2025 · Cajun Field · Closing line: Southern Miss −4.5

Luck index +66 Southern Miss very lucky · −66 Louisiana

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. Southern Miss wins 3, Louisiana wins 7.

  1. 1 USM 21 UL 7
  2. 2 USM 21 UL 14
  3. 3 USM 13 UL 10
  4. 4 USM 0 UL 3
  5. 5 USM 10 UL 14
  6. 6 USM 10 UL 17
  7. 7 USM 14 UL 24
  8. 8 USM 0 UL 14
  9. 9 USM 3 UL 20
  10. 10 USM 0 UL 24

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, conversion and judgment call redrawn; everything else fixed. The narrowest view of luck.

How 4,000 replays ended

Southern Miss wins 34% of them, Louisiana 66%, counting the 5% still level after regulation as half each. The line is what actually happened: Southern Miss by 12.

Show as a table
Final margin in the replaysShare of replays
Southern Miss by 17+3.7%
Southern Miss by 9–168.4%
Southern Miss by 1–818.7%
Level after regulation5.0%
Louisiana by 1–825.2%
Louisiana by 9–1620.1%
Louisiana by 17+19.0%

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 +2.0 points to Louisiana: the final margin was Southern Miss by 12, without the luck Southern Miss by 14. Luck shares are the fitted ones (how much of each kind is luck).

Penalties: Southern Miss 4 for 28 yards, Louisiana 6 for 50 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 11:29 False Start on Southern Miss, 5 yards · pre-snap +2% UL +1.1 pts
Q3 11:16 Holding on Louisiana, 10 yards +2% USM +0.9 pts
Q3 7:02 Unsportsmanlike Conduct on Southern Miss, 15 yards +6% UL +2.2 pts
Q3 4:31 Holding on Southern Miss, 3 yards +2% UL +0.7 pts
Q3 3:40 Sideline Interference on Louisiana, 15 yards +17% UL +5.3 pts
Q3 1:03 False Start on Louisiana, 5 yards · pre-snap +2% USM +0.9 pts
Q4 13:32 Holding on Louisiana, 10 yards +3% USM +0.9 pts
Q4 10:23 Running Into the Kicker on Louisiana, 5 yards +3% USM +1.9 pts
Q4 8:27 False Start on Southern Miss, 5 yards · pre-snap +2% UL +1.1 pts
Q4 6:12 False Start on Louisiana, 5 yards · pre-snap +1% USM +0.7 pts

When it happened

Louisiana’s chance of winning

As low as 0% and as high as 67%. Numbers mark the biggest luck moments, listed below.

Our in-game win probability: the score, the value of the possession and the time left, starting from the betting line. Overtime has no clock and is drawn at a fixed width. Shaded above the middle while Louisiana was ahead in it, below while Southern Miss was.
#WhenWhat happenedWin probability forNext drive
1 Q1 11:49 Southern Miss was stopped on 3rd & 23rd & 4th downs · 64% expected +3% UL USM: Punt
2 Q1 3:21 Louisiana converted 4th & 13rd & 4th downs · 71% expected +4% UL UL: Punt
3 Q3 8:02 Southern Miss was stopped on 3rd & 83rd & 4th downs · 32% expected +3% UL USM: Punt
4 Q3 7:02 Unsportsmanlike Conduct on Southern Miss, 15 yardsJudgment calls +6% UL UL: Punt
5 Q3 4:50 Louisiana was stopped on 3rd & 83rd & 4th downs · 32% expected +4% USM UL: Punt
6 Q3 3:40 Southern Miss converted 3rd & 143rd & 4th downs · 22% expectedSideline Interference on Louisiana, 15 yardsJudgment calls +8% UL USM: Punt
7 Q4 13:32 Holding on Louisiana, 10 yardsJudgment calls +3% USM USM: Punt
8 Q4 10:23 Running Into the Kicker on Louisiana, 5 yardsJudgment calls +3% USM USM: Punt

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

Southern Miss 99% · Louisiana 1%

Final margin
Southern Miss by 12
Luck in points
2.0 for Louisiana
Luck-adjusted margin
Southern Miss by 14.0
Replay with same day's form
Southern Miss 34% · Louisiana 66% 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 expected points from CollegeFootballData.com via cfbfastR; win probability from our own model of the score, the possession and the betting line; kicks valued against each kicker’s own record. College play-by-play has no charting of drops or interception-worthy throws and no injury reports, so those kinds of luck aren’t counted here. Part of this game's play-by-play is missing from the source: the plays on file account for 17 of the 32 points, so the replay rests on the plays there are.

Methodology and validation · All Week 8 2025 games · Southern Miss · Louisiana

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