luckadjusted
CFB Week 4 · 2026

Week 6 2025 · October 4, 2025

Western Michigan at Massachusetts, Week 6 2025: who deserved to win?

Western Michigan beat Massachusetts 21–3, and the replays back it up: with the way both teams actually played, Western Michigan wins 9 of 10.

Before kickoff Western Michigan was a 79% favorite.

Final

Western Michigan Broncos 21
Massachusetts Minutemen 3

October 4, 2025 · Warren McGuirk Alumni Stadium · Closing line: Western Michigan −12.5

Luck index +6 Western Michigan about even · −6 Massachusetts

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 Michigan wins 9, Massachusetts wins 1.

  1. 1 WMU 45 MASS 3
  2. 2 WMU 44 MASS 10
  3. 3 WMU 34 MASS 6
  4. 4 WMU 38 MASS 14
  5. 5 WMU 31 MASS 10
  6. 6 WMU 24 MASS 6
  7. 7 WMU 24 MASS 10
  8. 8 WMU 20 MASS 9
  9. 9 WMU 14 MASS 10
  10. 10 WMU 2 MASS 7

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 Michigan wins 94% of them, Massachusetts 6%, counting the 1% still level after regulation as half each. The line is what actually happened: Western Michigan by 18.

Show as a table
Final margin in the replaysShare of replays
Western Michigan by 17+67.4%
Western Michigan by 9–1616.2%
Western Michigan by 1–810.5%
Level after regulation1.3%
Massachusetts by 1–83.4%
Massachusetts by 9–161.0%
Massachusetts by 17+0.3%

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 +7.6 points to Western Michigan: the final margin was Western Michigan by 18, without the luck Western Michigan by 10.4. 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.

  • D. Morris, 36 yds made · 79% expected
  • D. Morris, 46 yds missed · 61% expected
  • P. Domschke, 48 yds missed · 56% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

Penalties: Western Michigan 4 for 35 yards, Massachusetts 5 for 47 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 11:04 Illegal Formation on Massachusetts, 5 yards, wiping out the play · pre-snap +5% WMU +3.0 pts
Q1 8:08 Personal Foul on Massachusetts, 15 yards +8% WMU +4.6 pts
Q1 3:48 Pass Interference on Western Michigan, 15 yards, wiping out the play +4% MASS +2.5 pts
Q2 13:16 Penalty on Massachusetts, 10 yards +1% WMU +0.7 pts
Q2 11:30 Pass Interference on Massachusetts, 12 yards +3% WMU +1.4 pts
Q3 6:56 Illegal Shift on Massachusetts, 5 yards, wiping out the play · pre-snap +4% WMU +2.1 pts
Q3 1:26 Offside on Western Michigan, 5 yards · pre-snap 0% MASS +1.0 pts
Q4 12:43 Holding on Western Michigan, 10 yards +1% MASS +1.5 pts
Q4 5:30 Illegal Substitution on Western Michigan, 5 yards · pre-snap 0% MASS +0.6 pts

When it happened

Massachusetts’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 Massachusetts was ahead in it, below while Western Michigan was.
#WhenWhat happenedWin probability forNext drive
1 Q1 11:04 Illegal Formation on Massachusetts, 5 yards, wiping out the playPre-snap flags +5% WMU WMU: End of half
2 Q1 8:08 Personal Foul on Massachusetts, 15 yardsJudgment calls +8% WMU WMU: End of half
3 Q1 3:48 Pass Interference on Western Michigan, 15 yards, wiping out the playJudgment calls +4% MASS MASS: Missed field goal
4 Q2 14:28 Massachusetts converted 3rd & 43rd & 4th downs · 46% expected +4% MASS MASS: Missed field goal
5 Q2 12:01 D. Morris missed a 46-yard field goalKicks · 61% expected for him, 1 of 1 from 45+ before +5% WMU MASS: Punt
6 Q2 1:42 P. Domschke missed a 48-yard field goalKicks · 56% expected for him, 4 of 8 from 45+ before +4% MASS WMU: End of half
7 Q3 6:56 Illegal Shift on Massachusetts, 5 yards, wiping out the playPre-snap flags +4% WMU WMU: Touchdown
8 Q3 4:29 Western Michigan converted 4th & 43rd & 4th downs · 49% expected +6% WMU WMU: 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 Michigan 93% · Massachusetts 7%

Final margin
Western Michigan by 18
Luck in points
7.6 for Western Michigan
Luck-adjusted margin
Western Michigan by 10.4
Replay with same day's form
Western Michigan 94% · Massachusetts 6% 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 6 2025 games · Western Michigan · Massachusetts

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