luckadjusted
CFB Week 4 · 2026

Week 2 2026 · September 12, 2026

Western Illinois at Wisconsin, Week 2 2026: who deserved to win?

Wisconsin beat Western Illinois 36–9, and the replays back it up: with the way both teams actually played, Wisconsin wins 9 of 10.

Before kickoff Wisconsin was a 100% favorite.

Final

Western Illinois Leathernecks 9
Wisconsin Badgers 36

September 12, 2026 · Camp Randall Stadium · Closing line: Wisconsin −43.5

Luck index +5 Wisconsin about even · −5 Western Illinois

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. Western Illinois wins 1, Wisconsin wins 9.

  1. 1 WIU 17 WIS 10
  2. 2 WIU 20 WIS 24
  3. 3 WIU 6 WIS 14
  4. 4 WIU 10 WIS 21
  5. 5 WIU 14 WIS 28
  6. 6 WIU 14 WIS 31
  7. 7 WIU 7 WIS 28
  8. 8 WIU 10 WIS 35
  9. 9 WIU 7 WIS 38
  10. 10 WIU 7 WIS 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, conversion and judgment call redrawn; everything else fixed. The narrowest view of luck.

How 4,000 replays ended

Western Illinois wins 5% of them, Wisconsin 95%, counting the 1% still level after regulation as half each. The line is what actually happened: Wisconsin by 27.

Show as a table
Final margin in the replaysShare of replays
Western Illinois by 17+0.1%
Western Illinois by 9–160.8%
Western Illinois by 1–83.5%
Level after regulation0.8%
Wisconsin by 1–89.7%
Wisconsin by 9–1619.1%
Wisconsin by 17+66.0%

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.

No play in this game swung win probability by luck.

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 +6.9 points to Wisconsin: the final margin was Wisconsin by 27, without the luck Wisconsin by 20.1. 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.

  • G. Lahm, 30 yds made · 87% expected
  • R. Culkin, 27 yds made · 89% expected
  • G. Lahm, 49 yds made · 56% expected
  • R. Culkin, 27 yds made · 89% expected
  • G. Lahm, 51 yds made · 53% expected
  • R. Culkin, 34 yds made · 82% expected
  • Extra point missed · 98% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

Penalties: Western Illinois 5 for 40 yards, Wisconsin 4 for 40 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 9:32 False Start on Western Illinois, 5 yards · pre-snap 0% WIS +0.7 pts
Q1 1:48 Offside on Western Illinois, 5 yards · pre-snap 0% WIS +0.3 pts
Q1 0:28 Holding on Wisconsin, 10 yards 0% WIU +0.6 pts
Q2 4:10 Pass Interference on Western Illinois, 15 yards, wiping out the play +1% WIS +4.1 pts
Q2 2:17 Horse Collar Tackle on Wisconsin, 15 yards 0% WIU +1.6 pts
Q3 10:38 Holding on Western Illinois, 10 yards, wiping out the play 0% WIS +4.1 pts
Q3 10:27 Delay of Game on Western Illinois, 5 yards · pre-snap 0% WIS +0.1 pts
Q3 1:48 Holding on Wisconsin, 10 yards 0% WIU +1.0 pts
Q4 9:03 Illegal Formation on Wisconsin, 5 yards · pre-snap 0% WIU +1.7 pts

When it happened

Wisconsin’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 Wisconsin was ahead in it, below while Western Illinois was.
#WhenWhat happenedWin probability forNext drive
1 Q2 7:13 Western Illinois converted 4th & 23rd & 4th downs · 63% expected +0% WIU WIU: Field goal
2 Q2 4:10 Pass Interference on Western Illinois, 15 yards, wiping out the playJudgment calls +1% WIS WIS: Field goal
3 Q2 2:30 G. Lahm made a 51-yard field goalKicks · 53% expected for him, 1 of 1 from 45+ before +0% WIS WIS: Turnover on downs
4 Q3 13:12 Western Illinois converted 3rd & 13rd & 4th downs · 76% expected +0% WIU WIU: Field goal
5 Q3 12:16 Western Illinois converted 3rd & 33rd & 4th downs · 54% expected +0% WIU WIU: Field goal
6 Q3 10:38 Holding on Western Illinois, 10 yards, wiping out the playJudgment calls +0% WIS WIS: Touchdown
7 Q3 10:24 R. Culkin made a 34-yard field goalKicks · 82% expected for him +0% WIS WIU: Turnover on downs
8 Q3 6:19 Wisconsin converted 3rd & 53rd & 4th downs · 43% expected +0% WIS WIS: Touchdown

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

Western Illinois 0% · Wisconsin 100%

Final margin
Wisconsin by 27
Luck in points
6.9 for Wisconsin
Luck-adjusted margin
Wisconsin by 20.1
Replay with same day's form
Western Illinois 5% · Wisconsin 95% 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 2 2026 games · Western Illinois · Wisconsin

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