CHICAGO — CHICAGO (AP) — Dominic Zvada kicked a 31-yard field goal as time expired, Jordan Marshall ran for 142 yards and two touchdowns before exiting with an injury and No. 18 Michigan stayed in the playoff chase by beating Northwestern 24-22 at Wrigley Field on Saturday.The Wolverines (8-2, 6-1 Big Ten, No. 18 CFP) overcame three late turnovers, including two interceptions by Bryce Underwood, and remained in the running for the College Football Playoff with their fourth straight win. Northwestern (5-5, 3-4) lost its third in a row.Zvada’s boot capped a 50-yard drive and set off a celebration on the field and in the stands, where a large part of the crowd wore maize and blue.Michigan was up 21-9 when the Wildcats’ Preston Stone plowed in from the 1 two minutes into the fourth quarter.Michigan then had a third down at its 26 when Braden Turner picked off a pass intended for Deakon Tonielli and returned it to the 6. Caleb Komolafe ran it in on the next play, giving Northwestern at 22-21 lead with 12:05 remaining in the game. The 2-point conversion pass failed.Michigan then drove to the 30 before Underwood got picked off again, this time by Robert Fitzgerald at the 20. The Wolverines had another opportunity after Northwestern punted, only to give it away again after opting not to go for the fi …