The Vikings gave up 195 rushing yards in their 30-20 loss at Seattle on Sunday, and had a back run for more than 100 yards against them for the fourth consecutive game.
Coach Leslie Frazier talked at length Monday about needing to improve his team's run defense.
"Our defense doesn't resemble the type of run defense we're capable of playing," he said, adding the team might have to "start from Square 1."
Said linebacker Chad Greenway, who leads the NFL with 94 tackles: "Obviously what Coach says is the golden word, but from our standpoint in the defensive room, it's more about going out there and just doing our job.
"We have to stay the course and just do our job a little bit better, starting with myself. Everybody does that across the board on this team [and] we'll have a chance. Everybody just has to look at himself and say, 'Hey, what can I do better?'"
Frazier said there were missed tackles, and some occasions where the Vikings still were not where they needed to be.
"We don't want to keep coming back on Mondays and talking about our run defense," he said. "So we've got to figure it out."
On Ponder Frazier said he hasn't considered benching struggling quarterback Christian Ponder, who completed 11 of 22 passes for 63 yards and had a passer rating of 37.3 against the Seahawks, but he did talk about some of Ponder's issues Sunday.