luckadjusted
CFB Week 4 · 2026

Week 4 2026 · September 26, 2026

Nebraska at Michigan State, Week 4 2026: who deserved to win?

Nebraska beat Michigan State 31–13, but the replays call it close to a coin flip: with the way both teams played, Nebraska wins 5 of 10.

Before kickoff Nebraska was a 65% favorite.

Final

Nebraska Cornhuskers 31
Michigan State Spartans 13

September 26, 2026 · Spartan Stadium · Closing line: Nebraska −6

Luck index +52 Nebraska lucky · −52 Michigan State

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. Nebraska wins 5, Michigan State wins 5.

  1. 1 NEB 35 MSU 7
  2. 2 NEB 24 MSU 6
  3. 3 NEB 23 MSU 10
  4. 4 NEB 30 MSU 24
  5. 5 NEB 27 MSU 24
  6. 6 NEB 17 MSU 20
  7. 7 NEB 17 MSU 23
  8. 8 NEB 14 MSU 23
  9. 9 NEB 10 MSU 26
  10. 10 NEB 7 MSU 30

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

Nebraska wins 48% of them, Michigan State 52%, counting the 2% still level after regulation as half each. The line is what actually happened: Nebraska by 18.

Show as a table
Final margin in the replaysShare of replays
Nebraska by 17+11.7%
Nebraska by 9–1614.6%
Nebraska by 1–821.2%
Level after regulation1.8%
Michigan State by 1–820.7%
Michigan State by 9–1616.2%
Michigan State by 17+13.9%

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 +4.0 points to Michigan State: the final margin was Nebraska by 18, without the luck Nebraska by 22. 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 what happened.

  • L. Boyd, 48 yds made · 60% expected
  • K. Cunanan, 32 yds made · 85% expected
  • L. Boyd, 46 yds made · 63% expected
  • L. Boyd, 52 yds blocked · 53% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

Penalties: Nebraska 6 for 45 yards, Michigan State 5 for 60 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 11:14 Pass Interference on Nebraska, 10 yards +3% MSU +1.7 pts
Q1 9:41 Holding on Nebraska, 10 yards 0% MSU +0.9 pts
Q1 3:04 Holding on Michigan State, 10 yards +8% NEB +3.5 pts
Q2 15:00 Personal Foul on Michigan State, 15 yards +3% NEB +1.6 pts
Q2 15:00 False Start on Nebraska, 5 yards · pre-snap +1% MSU +0.8 pts
Q2 6:00 Holding on Nebraska, 10 yards +1% MSU +0.8 pts
Q2 6:00 Unsportsmanlike Conduct on Michigan State, 15 yards +3% NEB +1.6 pts
Q2 6:00 False Start on Nebraska, 5 yards · pre-snap +1% MSU +0.6 pts
Q3 8:43 Holding on Michigan State, 10 yards 0% NEB +1.4 pts
Q3 8:43 Illegal Substitution on Nebraska, 5 yards · pre-snap 0% MSU +0.3 pts
Q4 9:59 Holding on Michigan State, 10 yards 0% NEB +0.6 pts

When it happened

Michigan State’s chance of winning

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 Michigan State was ahead in it, below while Nebraska was.
#WhenWhat happenedWin probability forNext drive
1 Q1 12:10 Nebraska was stopped on 3rd & 53rd & 4th downs · 45% expected +3% MSU NEB: Punt
2 Q1 11:14 Pass Interference on Nebraska, 10 yardsJudgment calls +3% MSU MSU: Field goal
3 Q1 3:04 Holding on Michigan State, 10 yardsJudgment calls +8% NEB NEB: Touchdown
4 Q2 10:00 Michigan State converted 3rd & 93rd & 4th downs · 26% expectedK. Cunanan made a 32-yard field goalKicks · 85% expected for him +3% MSU MSU: End of half
5 Q2 2:00 Nebraska converted 3rd & 83rd & 4th downs · 34% expected +3% NEB NEB: End of half
6 Q3 7:23 Michigan State fumbled and Nebraska recoveredFumble bounces · loose balls are close to 50/50 +4% NEB MSU: End of half
7 Q3 5:56 Nebraska was stopped on 4th & 13rd & 4th downs · 78% expected +3% MSU NEB: Touchdown
8 Q3 1:27 L. Boyd had a 52-yard field goal blockedKicks · 53% expected for him, 4 of 4 from 45+ before +3% NEB MSU: Turnover

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

Nebraska 100% · Michigan State 0%

Final margin
Nebraska by 18
Luck in points
4.0 for Michigan State
Luck-adjusted margin
Nebraska by 22.0
Replay with same day's form
Nebraska 48% · Michigan State 52% 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.

Methodology and validation · All Week 4 2026 games · Nebraska · Michigan State

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