As we mentioned in a previous blog, Vikings rookie receiver Cordarrelle Patterson played only five offensive snaps Sunday.

Patterson was on the injury report last week because of a back issue, but coach Leslie Frazier said that had no bearing on his playing time.

"He's healthy," Frazier said. "We're going to try and get him a few more snaps. We've got to get a few more first downs so we can stay on the field a little bit longer with our offense. But we want to get him more snaps for sure."

Asked if Patterson is up to speed with the offense, Frazier said: "Yeah, he is. Not an issue. Just a coach's decision."

In other notes, Frazier acknowledged that his offensive line struggled against the Lions right four. In particular, left tackle Matt Kalil has not played up to the standard he set last season as a rookie. Kalil looked sluggish in preseason and he had another rough outing Sunday.

"There are some things that we've got to work with him on," Frazier said. "We've got to go back and look at his technique. Just some basic things that he did so well a year ago that we've got to get him back to doing on a repeated basis. We're going to have to do some technique and fundamental work to really get him back to a good foundation because we need him to play well every snap."

Also, Frazier said center John Sullivan suffered a knee contusion but he's hopeful that Sullivan will be able to practice on Wednesday.