CHICAGO —Harrison Smith intercepted Bears rookie quarterback Mitchell Trubisky with 2:04 remaining, and Kai Forbath nailed a 26-yard field goal with 12 seconds remaining to lift Minnesota past Chicago 20-17 at Soldier Field on Monday.

The clutch interception was Smith's fourth against the Bears and 14th all time. It was his third at Soldier Field.

Minnesota was able to run off most of the clock with a six-play, 20-yard drive that ended with Forbath's second short field goal of a night that featured little offense in the first half and got a little wacky.

Vikings quarterback Sam Bradford returned to the lineup, and Trubisky made his regular-season debut.

But the first two touchdown passes of the night were thrown by Vikings backup Case Keenum and Bears punter Pat O'Donnell.

Keenum relieved Bradford late in the second quarter and finished 17-of-21 passing for 140 yards that included a 13-yard touchdown pass to Kyle Rudolph.

Rudolph totaled six catches for 45 yards and one game of "Duck, duck, gray duck"—the Ohio native said "Duck, duck, goose" — with teammates who helped him celebrate the score in the end zone.   

The Bears turned to trickery in the third quarter with a fake punt.

O'Donnell took the long snap and lofted a floater to Benny Cunningham, who was wide open in the middle of the field. Cunningham cruised for the 38-yard touchdown, and Connor Barth kicked an extra point to make it a 10-9 game with 5:23 remaining in the period.

Minnesota responded quickly, however, with a 58-yard touchdown run by Jerick McKinnon. The run was the longest of the season for the Vikings, who were playing their first game of 2017 without Dalvin Cook.

McKinnon and Latavius Murray handled the brunt of the rushing attack in place of Cook, who suffered a torn ACL last week against Detroit.

McKinnon finished with 16 carries for 95 yards and a touchdown and added six receptions for 51 receiving yards.

The Bears, however, roared back with an 11-play, 79-yard drive that lasted 6:07. Trubisky capped the drive with a 20-yard touchdown pass to Zach Miller. Vikings safety Andrew Sendejo got a hand on the ball, but the deflection softly fluttered into Miller's paws.

Miller also had a hand in Chicago's tying two-point conversion. He took a handoff on a reverse and then pitched it to Trubisky on an option.

Trubisky finished 12-of-25 passing for 128 yards with one touchdown, the pivotal interception and a passer rating of 60.1.

Minnesota trailed 2-0 for much of the second quarter until a 26-yard field goal by Kai Forbath with 1:02 left in the first half.

The score was set up by the defense. Everson Griffen sacked Trubisky and forced a fumble that was recovered by Linval Joseph with 2:28 remaining in the first half.

It was Griffen's sixth sack in five games this season and the 54th of his career. It also was the sixth forced fumble of his career. Joseph's fumble recovery was his fourth in eight NFL seasons and his first with the Vikings.

Bradford returned to the lineup for the first time since Week 1.

He was 1-of-5 passing in the first quarter for minus-5 yards.

Keenum relieved Bradford with 25 seconds remaining in the first half. He completed all three pass attempts for 21 yards in the first half.

Bradford finished 5-of-11 passing with 36 yards. He also was sacked four times for combined losses of 35 yards, including a safety by Leonard Floyd that put the Bears up 2-0 with 1:31 left in the first quarter.