IOWA CITY, Iowa -- Cole Netten hit a 42-yard field goal with two seconds left and Iowa State rallied to beat Iowa 20-17 on Saturday, picking up its first win of the season.
Sam Richardson had 255 yards passing and 2 TDs for the Cyclones (1-2), who beat the rival Hawkeyes (2-1) for the third time in four tries.
Netten appeared to miss his first try at the game-winner, but Iowa had already called a timeout.
Netten's second attempt went straight through the uprights.
Jake Rudock threw for 146 yards and an interception for Iowa, which was held to just three points after halftime.
Down 14-3 midway through the third quarter, Iowa State found itself in desperate need of a spark.
T.J. Mutcherson gave the Cyclones life with their first takeaway of the season, intercepting Rudock and returning it to the Iowa 32. Richardson then found E.J. Bibbs with a jump pass on 4th and inches to pull Iowa State to 14-10 with 6:50 left in the third quarter.
Koehn's game-tying kick was just his third made field goal in six tries.
But the Cyclones, who were held scoreless in the second half of their first two games, drove 51 yards to set up Netten's winning kick.
Iowa State outgained Iowa 337-275.
Iowa senior lineman Brandon Scherff started, even though coach Kirk Ferentz said on Tuesday he was "day-to-day" after hurting his right knee in last week's win over Ball State.
The Hawkeyes were determined to get their surprisingly sluggish running game going behind their star left tackle.
The effort produced just 25 yards rushing in the first quarter. But the Hawkeyes went ahead 7-0 anyway on Mark Weisman's 1-yard TD leap.
Iowa was then faced with a 4th-down-and-8 at the Cyclones 16-yard line late in in the first half. But after missing three field goals from inside 40 yards last week, Iowa went for it. Rudock scrambled for space and found Jacob Hillyer for a first down, and then ran 5 yards for a touchdown and a 14-3 Iowa lead.
The Cyclones answered with their best drive yet.
Then they blew it at the end.
That turnover, along with an interception that cornerback Sam E. Richardson dropped on the previous drive, sapped the Cyclones of any momentum heading into halftime.
But after crumbling in the second half of its first two games, Iowa State outplayed the Hawkeyes in the second half.
Nealy made up for his earlier blunder, and Netten connected on the biggest kick of his career.
Follow Luke Meredith on Twitter: www.twitter.com/LukeMeredithAP
Former graduate assistant coach Zeb Noland returns to starting QB role for South Carolina football
South Carolina coach Shane Beamer said Sunday night that former graduate assistant coach Zeb Noland will return to the role of Gamecocks starting quarterback on Saturday vs. Texas A&M.
Orgeron plans to take time off from coaching
LSU coach Ed Orgeron reflects on his time with the Tigers and addresses his future.
Burrow disappointed about Coach O leaving LSU
Joe Burrow reacts to the news that Ed Orgeron will be leaving LSU at the end of the season.
Why Orgeron's exit at LSU shouldn't be much of a surprise
Chris Low shares why LSU decided to part ways with Ed Orgeron and lists off his potential successors.
LSU's football coaching search: Who could replace Ed Orgeron?
With LSU and Ed Orgeron reaching an agreement to part ways following the season, one of the game's best jobs is now open. Could former Texas A&M and current LSU AD Scott Woodward look to reunite with Jimbo Fisher in Baton Rouge?
LSU holds off Florida in high-scoring affair
Max Johnson throws three touchdown passes and Tyrion Davis-Price rushes for another three TDs to hold off No. 20 Florida 49-42.