Halftime: Michigan State 31, Iowa 7

IOWA CITY, Iowa -- Thoughts at halftime from Kinnick Stadium, where No. 17 Michigan State is crushing Iowa.

Turning point: Iowa cut its deficit to 14-7 and had Michigan State facing a third-and-6 from its own 30. The Hawkeyes pressured Kirk Cousins, who threw off his back foot, but receiver Keshawn Martin beat safety Tanner Miller to the ball and raced 67 yards. Although the Spartans failed to get in the end zone, they extended their lead to 10 points.

Best player in the half: It's close between Le'Veon Bell and Martin, but Bell gets the nod. The Michigan State sophomore is running with authority, as he showed with a powerful 25-yard touchdown run late in the half in which he broke three Iowa tackles. Bell finished the half with 11 carries for 71 yards and a touchdown. Defensive tackle Jerel Worthy also was fabulous both on defense and on special teams with a blocked field goal attempt.

Stat of the half: Here are several that illustrate the difference between a team playing its most polished game of the year and a team imploding. Michigan State has one penalty versus six for Iowa. The Spartans have no turnovers versus two for Iowa, both of which led to Michigan State touchdowns. Michigan State is averaging 5.4 yards per carry versus only 4.3 yards per carry for Iowa. The Spartans have held Marcus Coker, the Big Ten's leading rusher, to 42 yards on 13 carries.