Ohio State vs Iowa Prediction & Preview: Can Undefeated Iowa Pull An Upset?
Updated October 1, 2026
Updated October 1, 2026
No. 5 Ohio State visits No. 14 Iowa on Saturday for a matchup between 2 teams that opened Big Ten play with victories. The Buckeyes are 3-1 after beating Illinois 42-19, while Iowa is 4-0 following a dramatic 20-19 road win over Michigan. Both teams are 1-0 in conference play, and this is the first Ohio State-Iowa meeting with both ranked inside the AP top 15 since 2006.
Why Our Model Sees Value:
“The current total gives too much weight to Ohio State’s recent scoring stats and Iowa’s season scoring average, which is elevated by a weaker non-conference schedule. Iowa’s defense has been excellent, while its offense showed significant limitations against Michigan. Those factors point to fewer scoring possessions than the raw season averages suggest.”
Price vs. Projection
Polymarket currently prices Under 45.5 at roughly 50%, with Over 45.5 around 51%. That makes the total essentially a coin flip in the market. My projection gives the under a 55% chance, creating a 5% edge at the current price.
Iowa's Defense Good Enough
The main reason for the difference is Iowa’s defense. The Hawkeyes are allowing just 8.0 points and 239.8 total yards per game, ranking first nationally in scoring defense and 10th in total defense. Opponents have converted only 26.8% of third downs, and Iowa has yet to allow a rushing touchdown through 4 games. Ohio State averages 45.0 points, but its only road game produced 23 points in a 24-23 loss at Texas. A projected score near Ohio State 31, Iowa 13 puts the game at 44 total points and gives Under 45.5 room beneath the market number.
Recommended Position:
Under 45.5
Current Price:
50¢
Model Probability:
55%
Market Probability:
50%
Model Edge:
5%
Entry Threshold:
53¢
Model Confidence:
78/100
Both teams enter this Ohio State vs Iowa matchup at 1-0 in conference play, making this an important early result in a crowded Big Ten race. Iowa has already added a road victory over ranked Michigan to its résumé. Ohio State recovered from its 24-23 loss at Texas by beating Kent State 59-3 and Illinois 42-19. Iowa has won all 4 games and has surrendered only 32 points all season.
Julian Sayin and Jeremiah Smith are the biggest concern for an Iowa defense that has otherwise controlled opponents. Sayin has thrown for 1,206 yards with 10 touchdowns and 1 interception through 4 games. Smith has 617 receiving yards and 7 touchdowns. Smith has become the favorite in the Heisman Trophy futures market thanks to that production. Against Illinois alone, Sayin completed 27 of 36 passes for 367 yards and 4 touchdowns, with Smith producing 217 yards and 4 scores.
Iowa cannot expect to erase that combination, especially after Michigan threw for 276 yards last week. The more important question is whether the Hawkeyes can force Ohio State to string together long drives instead of creating quick touchdowns. Iowa allows only 152.0 passing yards per game and has consistently been strong on third down.
Iowa’s 32.8 points per game look impressive, but that average includes 40 points against Northern Illinois and 55 against Northern Iowa. The Michigan game provided a better indication of what the offense may look like against stronger opposition.
The Hawkeyes finished with just 285 total yards at Michigan and managed 58 rushing yards on 24 carries. Hank Brown threw for 227 yards and 2 touchdowns, but Iowa also received a 99-yard kickoff return touchdown. Brown has been efficient this season, completing 68% of his passes with 5 touchdowns and no interceptions, yet asking him to create consistent scoring drives against Ohio State is a much harder assignment.
Ohio State’s biggest defensive concern is the run. Illinois gained 199 rushing yards last week, so Iowa will have a path to sustaining drives if Kamari Moulton and the offensive line can exploit that area. Still, a successful Iowa running game can actually support the under by shortening the contest and reducing possessions.
The risk is Ohio State creating explosive scores through Sayin and Smith. If Iowa limits those plays and forces the Buckeyes to work through long drives, the Hawkeyes have enough defensive quality to keep Ohio State below its 45-point season average. With Iowa likely needing another low-scoring game to stay close, Under 45.5 carries the best value at the current Polymarket price.
