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Matchup preview

Boise State vs Western Michigan

Boise State visit Western Michigan in Week 4. The model favors Boise State by 7.1. Win probability, the tale of the tape, and the all-time series, all from real data.

Win probability
67%
33%

Model win probability from SP+ ratings + home-field edge.

The read
Model analysis · September 23 · refreshed weekly

SP+ separates these teams by nearly ten points, rating Boise State 6.9 (rank 47) against Western Michigan at -2.6 (rank 80), and the market largely agrees. The model win probability of 67 percent for Boise State sits right on the consensus line of Western Michigan +7 and its implied 66 percent, with the projected margin of 7.1 points matching the number almost exactly. The only real divergence is the ProphetX exchange, where Boise State -260 prices the road side at 72 percent, six points richer than both the model and the two-book consensus.

The unit ranks explain the gap. Western Michigan's offense sits at #105 and must work against a Boise State defense ranked #59, while the Boise State offense at #39 faces the more capable Western Michigan defense at #53. That imbalance frames the 50.3 total. Season form is mixed on both sides: Boise State lost 27-34 at Oregon before handling Memphis 38-20 and South Dakota 38-24, while Western Michigan fell 12-13 at Michigan and beat Monmouth 49-14 and Rice 28-21.

Longer view, the 10,000-run simulation projects 7.4 wins and a 7.6 percent Playoff chance for Boise State against 8 wins and 3 percent for Western Michigan, a reminder the ratings edge is favorite-grade, not dominant.

Model and consensus converge on Boise State by a touchdown, with only the ProphetX exchange pricing the road side notably steeper.

Matchup odds
Consensus line · 2 books
Spread
BOIS -7
Total (O/U)
50.3
Favorite
BOIS
Moneyline win probability (implied from the spread)

Real consensus line across 2 sportsbooks. Spread and total are the current market number; the win probabilities are implied from the spread.

Matchup odds price history
The market to win this game · daily prices, colored by the favorite
Boise State72%-18 ptsvsWestern Michigan28%+18 pts
0%25%50%75%100%Boise State favoredWestern Michigan favoredSep 13Sep 19Sep 21Sep 23

Real daily prices from the market to win this game, shown as Boise State's win price; Western Michigan's is 100 minus it (the same market's other side). Above the 50% line Boise State is favored, below it Western Michigan is, and each candle takes the favored team's color. Kalshi shows open-high-low-close candles (filled body closed up, hollow closed down). As of Sep 23.

Tale of the tape
Percentile vs FBS · 2025 stats, 2026 SP+
#47SP+SP+: Bill Connelly's tempo- and opponent-adjusted efficiency rating, expressed in points above average.#80
#55FPIFPI: ESPN's Football Power Index, an overall measure of team strength.#79
1594EloElo: a rating that rises or falls after each game based on the result and the quality of the opponent.1546
-Title oddsDe-vigged consensus probability to win the national title, averaged across the prediction markets we track.-
Boise StateWestern Michigansolid = better, faded = trailing
What these metrics mean
SP+. SP+: Bill Connelly's tempo- and opponent-adjusted efficiency rating, expressed in points above average.
FPI. FPI: ESPN's Football Power Index, an overall measure of team strength.
Elo. Elo: a rating that rises or falls after each game based on the result and the quality of the opponent.
Title odds. De-vigged consensus probability to win the national title, averaged across the prediction markets we track.
Off PPA. PPA (Predicted Points Added): the average point value each play adds. Higher is better for offense, lower for defense.
Success. Success rate: the share of plays that stay on schedule (roughly 50% of needed yards on 1st down, 70% on 2nd, 100% on 3rd/4th). Higher is better.
Explosive. Explosiveness: the average value of a team's successful plays, i.e. how big its good plays are when they hit.
Yards/game. Total yards gained per game.
Success allowed. How often the defense allows an on-schedule play (enough yards for the down). Lower is better.
Havoc. Havoc rate: the share of plays where the defense makes a tackle for loss, forced fumble, interception, or pass breakup.
Yards allowed. Total yards allowed per game. Lower is better.
Efficiency profile
Percentile vs FBS · 2025
More Week 4 matchups
Model previews for the rest of the slate
FAQ

Frequently asked questions

How do I trade the Boise State vs Western Michigan game?

Kalshi lists winner markets for college football games. Sign up with code FADE (trade $25, get up to $500), open the Boise State vs Western Michigan market when it posts, and buy YES on your side; the price in cents equals the market's implied win probability. You can sell before kickoff or settlement at the current price.

When do Boise State and Western Michigan play?

Week 4 of 2026, on Sep 26, 2026 at Western Michigan.

Who is favored?

The model projects Boise State by 7.1 (67% win probability), from SP+ ratings.

Full schedule → · Both teams' playoff odds, from 10,000 simulations →

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