Vikings coach Mike Zimmer knew that his defense had been struggling some this season after giving up a league-best 275.9 yards and 15.8 points per game in 2017.
Since the end of the 2017 regular season, including the two playoff games and the first five regular-season games of 2018, the Vikings had been giving up 386.3 yards and 27.6 points per game.
So the dominant defensive performance in a 27-17 victory over Arizona on Sunday — the Cardinals offense managed only 10 points, with Arizona also returning a fumble for a touchdown — was a welcome sight for Zimmer, and a challenge that he said started with him.
"Our big thing right now with the defense is making sure we eliminate the big plays," Zimmer said. "I have been doing a better job of changing up coverages and changing up some of the different looks we have been getting and giving the quarterback a few more things to think about."
Arizona had 269 yards of offense, the fewest against the Vikings since they held Chicago to 201 yards in Week 17 last New Year's Eve.
Zimmer said he was mostly happy with Sunday's defensive performance. However, he remains concerned about the protection of quarterback Kirk Cousins, who was sacked five times by the Cardinals. The Vikings have given up 16 sacks over six games.
"There are always things I'm not happy with in games, but for the most part, overall I was happy with the defense today," Zimmer said. "Offensively I thought there were times we should have ran the ball a little bit more and obviously the tipped balls, the turnover for the touchdown, some of those things were not very good. We had three three-and-outs in a row. Those are things we have to work on and get better."
The Cardinals had shown they could get after it on defense when they had four sacks and three forced fumbles last week in their lone victory, at San Francisco. Zimmer said he saw that pressure Sunday on Cousins.