By Tyler Devine

IOWA CITY, Iowa – The last time Jim Harbaugh was in Kinnick Stadium, he was playing quarterback for the second-ranked Wolverines in 1985.

Things were eerily similar on Saturday night, only this time Harbaugh was leading second-ranked Michigan as its head coach.

The outcome was the same as 31 years ago, though, as Iowa true freshman kicker Keith Duncan made a 33-yard field goal as time expired to defeat Michigan 14-13 in prime time, making Iowa bowl eligible for the 15th time in the last 16 seasons.

Iowa also defeated Michigan 12-10 in 1985 on a field goal by Rob Houghtlin as time expired.

The Iowa fans stormed the field 31 years ago and did the same on Saturday to celebrate one of the greatest upsets in the history of the Iowa program. Michigan was favored by 22 points heading into the game.

The last time Iowa defeated a ranked opponent was Nov. 5, 2011 when it defeated No.13 Michigan 24-16. The Hawkeyes have won four consecutive games at home against the Wolverines. 

Iowa also improved to 10-4 all time in night games at Kinnick Stadium and has won the last four in a row.

After a late C.J. Beathard interception, Iowa forced Michigan to punt with just over one minute to play and then drove down the field to get Duncan in position to make what he described as the biggest kick of his young career.

"I had a feeling they would ice me," Duncan said. "But I wasn't thinking about it. If we got the first one off, I was going to kick it. If we got the second one off I was going to kick that too. I just took off (after the kick). I didn't really know what to do you don't really practice these things. I was just running and then I saw the fans.

"That was pretty cool, it was definitely the biggest kick of my career so far. (Graduate transfer punter) Ron Coluzzi and the line do an amazing job, it was a perfect hold. When I felt it off my foot I knew it was in. You really know right away off your foot. It's just the sound of the ball and how heavy it hits off your foot."

Injury report: Senior tight end George Kittle missed Saturday's game with an apparent foot injury. Senior cornerback Greg Mabin also didn't play because of an undisclosed injury, ending his streak of 31 consecutive starts. True freshman cornerback Manny Rugamba made his first career start in place of Mabin and had a key fourth-quarter interception, his second of the season.

Senior offensive lineman Cole Croston also didn't play on Saturday and was seen on the sideline using crutches with a boot on his foot. Sophomore offensive lineman Keegan Render made his fourth consecutive start at left guard.

Junior defensive back Miles Taylor started Saturday's game, but was removed after just one play due to an undisclosed injury. Senior defensive back Anthony Gair replaced Taylor at strong safety.

Big recruiting weekend: Over 60 recruits were in attendance for unofficial visits on Saturday including 2017 defensive back commits Josh Turner, a native of Delray Beach, Fla. and Matt Hankins, a native of Flower Mound, Texas.

Also on campus for official visits were Detroit, Mich. safety Scott Nelson and Marlton, N.J. running back and Rutgers commit Jon Lovett. Nelson released his top five late in the summer, which included Iowa, Michigan State, Northwester, Penn State and Wisconsin.

Iowa City West standout receiver Oliver Martin was on hand for yet another unofficial visit. Martin is considering both Iowa and Michigan.

Consistent Coluzzi: Ron Coluzzi's day got off to a dubious start when he tried to avoid the rush on a punt before stumbling in the first quarter. With his weight falling forward, Coluzzi did a full somersault before being hit by Michigan's Devin Bush.

Iowa caught a break, though, when Bush was called for targeting on the play and disqualifed from the game.

"I thought it was going to get blocked and I showed some really poor athleticism," Coluzzi said. "Are you kidding me? A somersault and I get hit in the head. But that's football."

That was about the only negative of Coluzzi's game though as he would go on to average 47 yards per punt, including three downed inside the 20. One of which would result in a safety just before halftime.

Only one of Coluzzi's punts was returned as Iowa held Michigan's jack-of-all-trades Jabril Peppers to just 7.7 yards per touch. Peppers entered Saturday's game averaging 14.7 yards per touch.

Moving on up: Beathard threw his 37th touchdown pass of his career, tying Chuck Hartlieb for sixth all-time in program history. Beathard connected with junior running back Akrum Wadley for a 3-yard touchdown pass late in the second quarter on Saturday.

Wicked Wadley: Wadley had his seventh career 100-yard rushing game on a Saturday against a Michigan defense that was only allowing 107.2 rushing yards per game. Wadley has led or tied for the team lead in receptions in each of the last three games. Wadley has 17 receptions for 156 yards and two touchdowns in that span.

Ferentz factor: Iowa head coach Kirk Ferentz collected his 80th Big Ten victory on Saturday to rank seventh among the conference's all-time winningest coaches. Ferentz needs one more win to tie former Michigan head coach Lloyd Carr for sixth all time.