He was 21 for 29 to go along with four passing touchdowns and two interceptions in the game. He threw two second-half interceptions.
Case Keenum led Minnesota's offensive attack with 304 yards and four touchdown passes.
And with that, the Vikings improved to 7-2 on the season, on a day when their defense was far from flawless.
Quarterback Kirk Cousins passed for one touchdown and ran for two more. The Redskins (4-5) failed to build off an upset victory at Seattle and now find themselves on an uphill climb in the wild-card race.
One of the few bright spots in the contest was the play of safety D.J. Swearinger.
Redskins: Visit the New Orleans Saints on Sunday in a game they now badly need to win given their upcoming schedule. The second-year pro out of Cal, who had eight catches in 10 games last season, was promoted from the practice squad on Saturday and active for the first time this year.
Redskins: Coach Jay Gruden said WR Ryan Grant is in the NFL's concussion protocol.
Vikings quarterback Case Keenum almost let Washington back into the game. Five plays later, Keenum threw a 3-yard touchdown pass to Diggs. The call was reversed, resulting in a 36-yard touchdown catch that you'll see on highlight reels for a while. Crowder has been Washington's punt returner in every game since he entering the National Football League in 2015. Keenum passed to tight end David Morgan for a 1-yard touchdown and the Vikings' lead was 11.
Vikings: They played without DE Everson Griffen because of a foot injury. The Redskins took advantage of the field position and scored on the ensuing possession.