Two unbeaten teams meet in Ann Arbor on Saturday, September 26, when Iowa and Michigan collide in a marquee matchup in Week 4 of the 2026 college football season. They have taken different routes to 3-0, though. Iowa arrives after a 55-0 win over Northern Iowa, while Michigan is preparing for its fourth consecutive home game after a 52-17 win over UTEP in Week 3.

The Hawkeyes ran for 422 yards last week, and Hank Brown completed all 12 of his passes. The next test is much tougher: Michigan has allowed 220 yards per game through its first three outings.

My final Iowa vs Michigan prediction weighs those defensive numbers against each offense’s ability to sustain drives. Below are my total and spread selections, the Kalshi prices, and the trends that matter most to this matchup.

Prediction | Spread | Betting Trends

I prefer the under to the spread. Michigan is averaging 323.3 offensive yards per game, while Iowa has allowed only 176.7, the best mark in the country. That combination makes it difficult for me to project a steady stream of long scoring drives, even with both teams coming off productive offensive performances.

Iowa’s defense has surrendered 13 points through three games, an average of 4.3. The opponents matter, so I am not treating that number as a forecast. Still, allowing 3.19 yards per play and just 15 gains of at least 10 yards gives the Hawkeyes a credible starting point.

Bryce Underwood gives Michigan a way to break the game open with his legs. He leads the Wolverines with 504 passing yards and 156 rushing yards, but his career passing numbers against ranked teams are less convincing: 48.5% completions, two touchdowns and four interceptions across four games.

The risk to my under is a short field or explosive rushing play. Iowa is averaging a nation-best 7.4 yards per carry, so this is not the same offense that struggled in 2022 and 2023. I am betting on the defensive step up to matter more than last week’s blowout scores.