Iowa's Passing Game Has A New Problem After Tony Diaz's Breakout

As Iowa Hawkeyes prepare to face Northern Iowa, their quest for a balanced offense hinges on adapting their passing game in the face of key lineup changes and strategic play-action opportunities.

Iowa’s passing game already has one clear headliner in Tony Diaz, but the next piece of the puzzle may be the tight end room. That group has long been a signature part of the Hawkeyes’ offense, and Week 3 against Northern Iowa looks like a chance to get it rolling again.

DJ Vonnahme has been Iowa’s leading tight end so far, with six catches for 67 yards in two games. Even with that production, the ball has gone heavily toward Diaz early in the season, and Vonnahme is expected to miss the Northern Iowa game.

That puts Addison Ostrenga, Zach Ortwerth, and Thomas Meyer in line for more work. Iowa’s tight ends have combined for 11 receptions and 98 yards, and the plan has clearly been to feed Diaz as the new element in the passing attack.

That makes the tight ends more important, not less. Their presence in the middle of the field has to matter enough to freeze safeties for just a beat, because that’s often all Diaz needs to create separation.

And once the Big Ten schedule arrives, Iowa is going to run into cornerbacks who can win their share of snaps. The Hawkeyes need Ostrenga, Meyer, and Ortwerth to be part of the answer instead of leaning too hard on Diaz.

Vonnahme’s numbers may not jump off the page yet, but he still sits second on the team in both receptions and yards. After the way he finished the 2025 season, the start to this year has felt quiet by comparison.

Still, his skill set gives Iowa plenty to work with. He can move well for a tight end, threaten the open field, and use his size to work through contact.

When he comes back, the play-action game feels like the best place to unleash him.

That fits what Iowa wants to be anyway. The Hawkeyes are going to lean on the run, which means linebackers will be crashing downhill and safeties will have to respect the backfield action. That’s where Ostrenga, Ortwerth, and Meyer can do damage on crossing routes and other play-action looks that let them catch the ball in stride and build yards after the catch.

There’s no reason not to work on it against Northern Iowa. Every team uses play-action with tight ends moving across the formation.

This week is about getting the timing right and giving Hank Brown and the tight ends live reps together. If the throw is a little off, it can still be completed, but the chance for a bigger gain shrinks fast.

Northern Iowa gives Iowa the opportunity to clean that up now.

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