luckadjusted
CFB Week 4 · 2026

Week 4 2026 · September 26, 2026

Virginia Tech at Boston College, Week 4 2026: who deserved to win?

Virginia Tech beat Boston College 21–14, and the replays back it up: with the way both teams actually played, Virginia Tech wins 8 of 10. Boston College had the bounces: fumble bounces alone were worth 10 points of win probability to Boston College.

Before kickoff Virginia Tech was an 83% favorite. The biggest swing (Q4, 9:15 left): Holding on Boston College, 10 yards, worth 13 points of win probability to Virginia Tech.

Final

Virginia Tech Hokies 21
Boston College Eagles 14

September 26, 2026 · Alumni Stadium (Chestnut Hill, MA) · Closing line: Virginia Tech −14.5

Luck index +19 Virginia Tech about even · −19 Boston College

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. Virginia Tech wins 8, Boston College wins 2.

  1. 1 VT 34 BC 0
  2. 2 VT 25 BC 0
  3. 3 VT 24 BC 3
  4. 4 VT 23 BC 6
  5. 5 VT 21 BC 7
  6. 6 VT 13 BC 3
  7. 7 VT 17 BC 10
  8. 8 VT 17 BC 14
  9. 9 VT 13 BC 16
  10. 10 VT 5 BC 17

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

Virginia Tech wins 81% of them, Boston College 19%, counting the 4% still level after regulation as half each. The line is what actually happened: Virginia Tech by 7.

Show as a table
Final margin in the replaysShare of replays
Virginia Tech by 17+35.6%
Virginia Tech by 9–1624.3%
Virginia Tech by 1–817.3%
Level after regulation4.3%
Boston College by 1–811.2%
Boston College by 9–165.5%
Boston College by 17+1.8%

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 +4.0 points to Boston College: the final margin was Virginia Tech by 7, without the luck Virginia Tech by 11. 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.

  • J. Love, 45 yds made · 66% expected
  • J. Love, 22 yds made · 97% expected
Bar: expected chance of a make. Filled dot: made. Open dot: missed or blocked.

Penalties: Virginia Tech 4 for 45 yards, Boston College 8 for 89 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 3:14 Holding on Boston College, 9 yards +2% VT +1.7 pts
Q1 0:41 Personal Foul on Boston College, 15 yards +3% VT +1.8 pts
Q2 10:55 Holding on Boston College, 10 yards +2% VT +1.0 pts
Q2 8:09 False Start on Virginia Tech, 5 yards · pre-snap +1% BC +0.7 pts
Q2 5:59 Roughing the Passer on Boston College, 15 yards +1% VT +0.8 pts
Q2 2:45 Unsportsmanlike Conduct on Virginia Tech, 15 yards +2% BC +0.9 pts
Q3 6:25 Delay of Game on Boston College, 5 yards · pre-snap +3% VT +0.9 pts
Q4 9:15 Holding on Boston College, 10 yards +13% VT +3.0 pts
Q4 8:04 Pass Interference on Boston College, 10 yards +8% VT +1.6 pts
Q4 6:45 Targeting on Virginia Tech, 15 yards +10% BC +1.6 pts
Q4 2:00 Holding on Virginia Tech, 10 yards, wiping out the play +1% BC +1.3 pts
Q4 2:00 Personal Foul on Boston College, 15 yards +1% VT +1.5 pts

When it happened

Boston College’s chance of winning

As low as 0% and as high as 74%. 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 Boston College was ahead in it, below while Virginia Tech was.
#WhenWhat happenedWin probability forNext drive
1 Q2 10:58 Virginia Tech was stopped on 4th & 13rd & 4th downs · 77% expected +6% BC VT: Punt
2 Q3 8:06 Virginia Tech fumbled and Boston College recoveredFumble bounces · loose balls are close to 50/50 +8% BC VT: Turnover on downs
3 Q3 1:13 Virginia Tech was stopped on 4th & 43rd & 4th downs · 47% expected +10% BC VT: Touchdown
4 Q4 9:15 Holding on Boston College, 10 yardsJudgment calls +13% VT VT: Touchdown
5 Q4 8:05 Virginia Tech’s two-point try was good3rd & 4th downs · 46% expected +6% VT VT: Touchdown
6 Q4 8:04 Pass Interference on Boston College, 10 yardsJudgment calls +8% VT VT: Touchdown
7 Q4 6:45 Targeting on Virginia Tech, 15 yardsJudgment calls +10% BC BC: Punt
8 Q4 5:18 Boston College was stopped on 3rd & 63rd & 4th downs · 38% expected +8% VT BC: 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

Virginia Tech 97% · Boston College 3%

Final margin
Virginia Tech by 7
Luck in points
4.0 for Boston College
Luck-adjusted margin
Virginia Tech by 11.0
Replay with same day's form
Virginia Tech 81% · Boston College 19% 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 · Virginia Tech · Boston College

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