Even at full strength, Northwestern figured to have a tough time with No. 20 Iowa.
Michigan won again without McGary, the star big man who is out indefinitely with a back injury.
Cook threw for two touchdowns. Langford ran for two scores, and the Spartans (10-1, 7-0) reached the conference title game for the second time in three years.
Michigan State is one win from its second Big Ten championship game in three seasons and two from the best conference record in school history.
Devin Gardner scored on a 5-yard run to lift Michigan to a 27-19 triple-overtime victory over Northwestern on Saturday after the Wolverines’ Brendan Gibbons tied it with a 44-yard field goal at the end of regulation.
The uniforms that Northwestern will wear against Michigan show what to some look like blood stains on an American flag.
In 2013 the college football craze remains who has the best looking uniforms.
Northwestern made a sweeping change by hiring Chris Collins in the offseason and sent out a loud message in the process.
Ohio State had its hands full with Northwestern. The Buckeyes did enough to win.
Trey Burke had 18 points and eight assists, and No. 1 Michigan was nearly flawless at the start Wednesday night en route to a 68-46 victory over Northwestern.