"Chad tested (Thursday), it went fairly well. But the rehab (on Friday) morning and the visit with the doctor was a little bit of a setback," coach Mike McCarthy said after Friday's practice. "We'll see how he feels (Saturday). He was down at the jog-through but didn't participate. So, we'll see if he can go in the jog-through (Saturday) and potentially at best be a gameday decision.
If Clifton can't play for a second consecutive game because of a sprained ankle, then Daryn Colledge will be at left tackle, Jason Spitz at left guard and Scott Wells at center. Colledge faces the biggest challenge, having to deal with the crowd noise and Pro Bowler Jared Allen. As Colledge said, Allen makes quality left tackles look bad, and he's merely a fill-in. Clearly, the Packers would have to give Colledge some help, but they might have to do the same if Clifton plays but is not 100 percent.
"I think he's having a good week of practice," offensive coordinator Joe Philbin said of Colledge.
One reason why the Packers originally went with Spitz over Wells at center was because of Spitz's added size. That size is critical when facing nose tackle Pat Williams, who allegedly weighs 317 pounds.
"The size issue is not new, by any stretch of the imagination," Wells said.
Packers injury report
Out — Safety Atari Bigby (knee); running back Brandon Jackson (ankle). Did not participate — Clifton; linebacker Jeremy Thompson (knee). Limited participation — Jolly, Raji, cornerback Charles Woodson (foot). Full participation — defensive end Cullen Jenkins (groin); receiver Greg Jennings (wrist).
Vikings injury report
Did not participate — Guard Steve Hutchinson (back); receiver Darius Reynaud (hamstring); limited participation — quarterback Brett Favre (foot); cornerback Cedric Griffin (hand); linebacker Erin Henderson (calf); linebacker E.J. Henderson (shoulder); tight end Jim Kleinsasser (hand); fullback Naufahu Tahi (back). Full participation — punter Chris Kluwe (illness).
Vikings coach Brad Childress aid he was just resting the Pro Bowler Hutchinson and that he expects the standout lineman to practice on Saturday.
Picking Brett's brain
Not surprisingly, the Vikings are trying to learn what they can about the Packers' offensive players from Brett Favre.
"There are still some guys on the club that he is familiar with on their offense and some of the things schematically that they are doing, there is some familiarity," defensive coordinator Leslie Frazier said. "We are picking his brain as much as we can to try and get some insight. Some of it is relative to know and some of it is kind of passé in some ways, but we are trying to pick his brain as much as we can."
Offensive coordinator Darrell Bevell, however, downplayed that Favre had much to share about the Packers' defense and the Vikings will be relying on their scouting.
"The two corners that we are facing are probably two of the best corners in the league on one team," Bevell said. "So we have to be mindful of them. Does Brett know them? Yeah, he does. Our guys know him, he knows them. We know what type of routes we want to throw on them (and) what type of routes we don't want to throw on them, because those two (cornerbacks) are about as good as they get."
NFL Network's Steve Mariucci, a former Packers assistant and a close friend of Favre, talked about Monday's quarterbacks in the NFL's official propaganda promoting the game.
On Favre: "Because of what he brings to the table, Brett Favre right now is one of the most exciting players in football. He makes life exciting for all football fans. As long as he is there, the Vikings will have the potential to be explosive at any time and they have the ability to beat anybody on any day. He's not being asked to carry the team like he did when he was in Green Bay. He's there to complement the run game and Adrian Peterson, but as he showed on Sunday, he's still dangerous."
On Rodgers: "Aaron Rodgers is really becoming a star. He can make all the throws and he can run better than most quarterbacks in the league. He's got great command of that offensive system and he's got weapons galore on that team. He's exciting to watch. He is, without a doubt, a Pro Bowl quarterback in the making."
Four-point stance (Favre edition)
— Vikings running back Adrian Peterson was asked if he'd like to win this game for Favre: "Well, I can speak for myself and I would say, yeah, of course. He's been around a long time. He was with the Packers for 16 years, so coming up against these guys in a Monday night game, (it's) a big rivalry, to take a firm hold right now in our divisional lead, it's a big game not only Brett, but for the Minnesota Vikings. But, inside, I definitely want to get this win for him, too."
— Packers linebacker Nick Barnett says facing Favre doesn't make this a grudge match: "You step on the field before the game starts, it's cool. We might say, ‘What's up?' As soon as the game starts, you know how it is, the glove are off and everyone's throwing punches, regardless of who it is. After the game, ‘Hope the family's doing good. Be safe, stay injury-free and that type of stuff.'"
— Favre will be the Vikings' sixth starting quarterback in the last seven games of this series. Facing Tarvaris Jackson (twice), Brad Johnson, Kelly Holcomb, Brooks Bollinger and Gus Frerotte the previous six games, the Packers have allowed six touchdown passes but picked off nine passes.
— With a victory over the Packers, Brett Favre would become the first starting quarterback to beat all 32 teams.
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Bill Huber is publisher of Packer Report magazine and PackerReport.com and has written for Packer Report since 1997. E-mail him at firstname.lastname@example.org, or leave him a question in Packer Report's subscribers-only Packers Pro Club forum. Find Bill on Twitter at twitter.com/packerreport and Facebook under Bill Huber.