Purdue vs. Illinois Prediction, Odds & Pick
Prediction, odds and the model's read
Our model's read
Scouting report
2026 projection · last season, roster and staff
Where Purdue gets at Illinois: 69th at staying on schedule through the air, against a unit 104th at keeping opponents off schedule through the air. Where Illinois gets at Purdue: 21st on first and second down, against a unit 132nd on early downs defensively. Illinois is also 26th at moving the ball on the ground, against a unit 125th.
How
PURattacks
ILL
- 1
Stay on schedule through the air
staying on schedule through the air · projected
PUR#69 of 138ILL#104 of 138
HowILLattacksPUR
- 1
Win first and second down
first and second down · projected
ILL#21 of 138PUR#132 of 138 - 2
Lean on the run
moving the ball on the ground · projected
ILL#26 of 138PUR#125 of 138 - 3
Stay on schedule through the air
staying on schedule through the air · projected
ILL#30 of 138PUR#120 of 138
The two teams
Purdue
Purdue is in year 2 under Barry Odom, whose offenses have been balanced. The way in is 132nd on early downs defensively, and they are 125th at shutting down the ground game.
On fourth down he goes for it less often than his peers do from the same spots (−3.9%). Against what the expected-points model recommends he is −40.2% — the profession as a whole is negative on this.
Purdue has not played an FBS opponent yet, so this is the projection: last season regressed toward the mean, plus returning production, recruiting, talent and whether the staff is the same one.
Projected soft spots
- Defensefirst and second down#132projected
- Defensemoving the ball on the ground#125projected
- Defensestaying on schedule through the air#120projected
Illinois
Illinois is in year 6 under Bret Bielema, whose offenses have been balanced. The strengths are offensive, led by 21st on first and second down. The way in is 134th at hitting chunk plays, and they are 104th at keeping opponents off schedule through the air.
On fourth down he goes for it about as often as his peers do from the same spots (+0.1%). Against what the expected-points model recommends he is −27.9% — the profession as a whole is negative on this.
Illinois has played 2 games against a genuinely tough slate, adjusted for here. That football carries about 0% of what is below; the rest is still the preseason projection.
Projected strengths
- Offensefirst and second down#21projected
- Offensemoving the ball on the ground#26projected
- Offensestaying on schedule through the air#30projected
Projected soft spots
- Offensehitting chunk plays#134projected
- Defensestaying on schedule through the air#104projected
Ranks are national. Nothing here is last season's number — carrying one forward is measurably worse than saying nothing — and in-season figures are adjusted for who was actually played. This describes the matchup; it is not a prediction and not a pick.
Head coaches only — there is no free feed for coordinators, so on a program where the head coach does not call the offense this describes the staff he hired. Play-calling identity is a style, not a grade: throwing more than the situations warrant is not better than throwing less than they warrant.
Model prediction
how the number is builtOur model simulates the game drive by drive from each side's opponent-adjusted efficiency (ILL Elo 1587, PUR Elo 1321 for reference), with home-field advantage. That projects ILL -4.9 (62% to win), essentially in line with the market.
Why that percentage is worth reading: across 604 graded in-season games, the calls this model put near 58% came in at 58.2%. The full calibration table is published, bin by bin. Early in the season the cold-start path runs instead and calibrates less well (Brier 0.2028 against 0.1889).
Model as of Sep 1 · through week 1 · drive simulation
Where the game is won
2026 national rank · right is better
offensethe defense it faces
Moving the ball
PUR64th104thILLILL57th108thPURThrough the air
PUR15th80thILLILL70th91stPUROn the ground
PUR76th118thILLILL93rd81stPURStaying on the field
PUR32nd97thILLILL62nd83rdPURTaking care of it
PUR1st88thILLILL31st88thPUR
Each bar runs from last in the country on the left to 1st on the right. The filled span is the gap between the offense and the defense it faces.
Season form — 2026
nationally rankedThe matchup, in context
series history + adjusted profilesThe series is level at 47–47–6 · Illinois has won 2 straight · 41% have been one-possession games
| PUR | ILL | |
|---|---|---|
| -1.8 (#78) | CORE overall | +6.7 (#45) |
| -1 / +1 | offense / defense | +7 / +1 |
Bold is the side ahead. CORE strips the situation from every play and solves the schedule out across the league, so these compare two teams that never met.
Key matchups
The analyst read: each team's offense splits crossed against the opponent's defense, with the edges called out.
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FAQ
Who will win Purdue vs. Illinois?
Gridpex's model favors Illinois with a 62% win probability.
What's the predicted spread for Purdue vs. Illinois?
The model projects Illinois by 4.9.
What time is Purdue vs. Illinois and what channel is it on?
Time TBD, at Memorial Stadium (Champaign, IL).
Where this number comes from. Every projection on this page is produced by the same model, run before kickoff on opponent-adjusted efficiency, power ratings and situational data — walk-forward validated on eleven seasons and never adjusted after the fact. How the model works →