ESPN analyst Jon Gruden has spent recent days watching film of the Vikings' first three games as he prepares for Monday night's telecast at the Metrodome. What Gruden has seen is that although Brett Favre is now the Vikings quarterback, teams are still sending extra men toward the line of scrimmage because of concerns about containing Pro Bowl running back Adrian Peterson.

"I haven't seen much change really in the Vikings in terms of what they're getting," Gruden said. "Everybody I've seen from Detroit to Cleveland up to last week against San Francisco. They're getting a lot of single safeties. Defenses know that if they don't get a lot of people up there Adrian Peterson can run around you, he can run through you, he can humiliate. That's how good this back is.

"I think when [wide receiver] Bernard Berrian gets back to health, he hasn't been healthy yet. He hasn't played to his capabilities, he's had a hamstring. I think with Percy Harvin -- I think the kickoff return [for a touchdown on Sunday] showed you what's capable of doing -- this is his first year as a receiver. I believe when these receivers like Sidney Rice, these young guys really get going, I think that Favre will take advantage of some of the single coverage looks that he's getting. But his receiving corps is a work in progress right now. But no matter who plays quarterback you're going to get a lot of premier looks to throw the football. That's how good this running back is."

Former NFL quarterback Ron Jaworski, who joins Gruden in the booth, had an interesting stat about Favre. Jaworski watches extensive amounts of game film and charts many of the things he sees. According to Jaworski, Favre threw 16 passes (out of 46) that went 10 yards or more in the Vikings' victory Sunday against San Francisco. In the Vikings opener, only three of his 21 passes went 10 yards or more and in the second game only five of his 27 passes went 10 yards or more.

Jaworski said he spent Wednesday watching film of every throw Favre has made this season and he came away impressed. Favre had surgery to repair his biceps tendon in May and there was some question about how his arm strength would be this season.

"I think clearly the arm strength is no problem," Jaworski said. "Anyone that saw the throw [to Greg Lewis on Sunday] to win the football game no question that ball was a 50-yard frozen rope. It was a laser. It was a terrific throw. So the arm strength is there. I find it kind of interesting after breaking down the first couple of games, he really didn't throw the ball down the field. They were all short passes. But when he had to get the ball down the field last Sunday he was getting it down the field. So clearly the arm strength was there, the mechanics are there. He may be a little bit slower of foot but he's going to be 40 years old in a couple of weeks. So I think all in all Brett Favre for a guy his age still has it going."