luckadjusted
CFB Week 4 · 2026

Week 9 2025 · October 22, 2025

Middle Tennessee at Delaware, Week 9 2025: who deserved to win?

Delaware beat Middle Tennessee 31–28, but the replays call it close to a coin flip: with the way both teams played, Delaware wins 4 of 10.

Delaware won on an off day: it played far below what the matchup promised. In a fresh game against Middle Tennessee it would win 78% of the time; with this day’s form, 42%. The numbers

Before kickoff Delaware was a 71% favorite. The biggest swing (Q2, 15:00 left): Face Mask on Middle Tennessee, 10 yards, worth 15 points of win probability to Middle Tennessee.

Final

Middle Tennessee Blue Raiders 28
Delaware Blue Hens 31

October 22, 2025 · Delaware Stadium · Closing line: Delaware −8.5

Luck index +58 Delaware lucky · −58 Middle Tennessee

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. Middle Tennessee wins 6, Delaware wins 4.

  1. 1 MTSU 41 DEL 7
  2. 2 MTSU 46 DEL 24
  3. 3 MTSU 34 DEL 17
  4. 4 MTSU 40 DEL 28
  5. 5 MTSU 34 DEL 27
  6. 6 MTSU 34 DEL 31
  7. 7 MTSU 30 DEL 33
  8. 8 MTSU 33 DEL 41
  9. 9 MTSU 9 DEL 24
  10. 10 MTSU 13 DEL 42

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.

Delaware won on an off day

It played far below what the matchup promised. In a fresh game against Middle Tennessee it would win 78% of the time; with this day’s form, 42%.

36 points apart for Delaware: the gap is how differently this game went from what the two teams usually are.

UnitThis gameUsual levelBetter or worse than usual
Middle Tennessee offenseEPA per play gained −0.33 +0.02 worse by 0.35
Middle Tennessee defenseEPA per play allowed +0.27 +0.13 worse by 0.14
Delaware offenseEPA per play gained +0.27 +0.16 better by 0.11
Delaware defenseEPA per play allowed −0.33 +0.12 better by 0.45

EPA (expected points added) per play on competitive snaps, turnovers left out because they are valued as luck. Usual level: the team’s earlier games this season plus half of last season, pulled toward the league average. One team’s defense and the other team’s offense are the same snaps, so one game can’t fully say whose day it was; it shows how far this one was from both teams’ norms.

How 4,000 replays ended

Middle Tennessee wins 58% of them, Delaware 42%, counting the 2% still level after regulation as half each. The line is what actually happened: Delaware by 3.

Show as a table
Final margin in the replaysShare of replays
Middle Tennessee by 17+24.1%
Middle Tennessee by 9–1615.2%
Middle Tennessee by 1–818.2%
Level after regulation1.8%
Delaware by 1–817.0%
Delaware by 9–1611.0%
Delaware by 17+12.8%

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 +4.8 points to Delaware: the final margin was Delaware by 3, without the luck Middle Tennessee by 1.8. Luck shares are the fitted ones (how much of each kind is luck).

Penalties: Middle Tennessee 8 for 75 yards, Delaware 4 for 33 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
Q2 15:00 Face Mask on Middle Tennessee, 10 yards +17% MTSU +6.7 pts
Q2 9:51 Holding on Middle Tennessee, 10 yards +1% DEL +0.3 pts
Q2 6:25 Delay of Game on Middle Tennessee, 5 yards · pre-snap +1% DEL +0.7 pts
Q2 6:25 Illegal Formation on Middle Tennessee, 5 yards · pre-snap +5% MTSU 0.0 pts
Q2 4:15 Intentional Grounding on Delaware, 8 yards +1% MTSU +0.5 pts
Q2 4:15 False Start on Delaware, 5 yards · pre-snap +1% MTSU +0.3 pts
Q2 4:15 False Start on Delaware, 5 yards · pre-snap +1% MTSU +0.2 pts
Q2 1:16 Pass Interference on Middle Tennessee, 15 yards 0% DEL +1.6 pts
Q3 6:52 Roughing the Passer on Delaware, 15 yards +2% MTSU +1.6 pts
Q3 5:11 Unsportsmanlike Conduct on Middle Tennessee, 15 yards +2% DEL +1.6 pts
Q4 13:03 False Start on Middle Tennessee, 5 yards · pre-snap +2% DEL +0.4 pts
Q4 2:38 Illegal Block on Middle Tennessee, 10 yards 0% DEL +0.6 pts

When it happened

Delaware’s chance of winning

As low as 45% and as high as 100%. 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 Delaware was ahead in it, below while Middle Tennessee was.
#WhenWhat happenedWin probability forNext drive
1 Q1 8:23 Middle Tennessee converted 3rd & 23rd & 4th downs · 64% expectedMiddle Tennessee converted 3rd & 53rd & 4th downs · 43% expected +4% MTSU MTSU: Touchdown
2 Q1 2:49 Delaware fumbled and Middle Tennessee recoveredFumble bounces · loose balls are close to 50/50 +6% MTSU DEL: End of half
3 Q2 15:00 Delaware converted 3rd & 23rd & 4th downs · 67% expectedFace Mask on Middle Tennessee, 10 yardsJudgment calls +15% MTSU DEL: End of half
4 Q2 9:51 Delaware converted 3rd & 93rd & 4th downs · 33% expectedDelaware converted 3rd & 43rd & 4th downs · 51% expectedDelaware was stopped on 3rd & 23rd & 4th downs · 67% expectedHolding on Middle Tennessee, 10 yardsJudgment calls +8% DEL DEL: Field goal
5 Q2 6:25 Middle Tennessee was stopped on 3rd & 93rd & 4th downs · 30% expectedN. Reed made a 49-yard field goalKicks · 52% expected for him, 0 of 2 from 45+ beforeDelay of Game on Middle Tennessee, 5 yardsPre-snap flagsIllegal Formation on Middle Tennessee, 5 yardsPre-snap flags +4% DEL MTSU: Punt
6 Q2 4:15 Delaware was stopped on 3rd & 33rd & 4th downs · 58% expectedIntentional Grounding on Delaware, 8 yardsJudgment callsFalse Start on Delaware, 5 yardsPre-snap flagsFalse Start on Delaware, 5 yardsPre-snap flags +6% MTSU DEL: Punt
7 Q3 1:39 Middle Tennessee was stopped on 3rd & 163rd & 4th downs · 20% expected +4% MTSU MTSU: Punt
8 Q4 13:03 Middle Tennessee converted 3rd & 13rd & 4th downs · 77% expectedMiddle Tennessee was stopped on 3rd & 53rd & 4th downs · 43% expectedFalse Start on Middle Tennessee, 5 yardsPre-snap flags +3% DEL MTSU: 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

Middle Tennessee 61% · Delaware 39%

Final margin
Delaware by 3
Luck in points
4.8 for Delaware
Luck-adjusted margin
Middle Tennessee by 1.8
Replay with same day's form
Middle Tennessee 58% · Delaware 42% 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 9 2025 games · Middle Tennessee · Delaware

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