Bud Grant oversaw the greatest stretch of defensive teams in NFL history from 1969 to '71, when his Vikings squads gave up 9.5 points per game in 1969, 10.2 in '70 and 9.9 in '71.
That 1969 total still stands as the second-best mark all-time. 1971 is tied for fourth, and 1970 ranks seventh.
Grant talked about what he sees from Mike Zimmer's defensive game plan these days, as the 2017 Vikings defense is ranked fourth in the NFL at 16.9 points per game and third in yards per game at 282.1.
"He understands defense, but he also understands one of the most important things in coaching is you have to understand the personalities and put them in the right spots," Grant said. "He understands who can play and puts them in position to be successful. He is a great defensive coach. As long as you go along and only allow a team one or two or even three touchdowns a game, you have a chance to win."
The fact that the Vikings, who sit at 6-2 during their bye week, are in first place in the NFC North has impressed Grant.
"We've got our share of injuries," he said. "If we can stay away from the injury bug and let this team develop it can go a long way. I don't think there's any question about that. But we're all even and all it takes is a bounce here, a tip there, and you can go from top to bottom in two weeks.
"This team is good enough. With the bye week, everyone can get healthier and make a run here at the end. There is no telling how far we can go. We are in the mix."
Parity a key
As the standings are now, 23 of the NFL's 32 teams are within three losses of each other, with the Eagles as the lone team with just one loss.