GREEN BAY, Wis. – Maybe someone should tell Minnesota Vikings coach Mike Zimmer that the Green Bay Packers don’t seem to care who he starts at quarterback – even if Mike McCarthy thinks he already knows.

Zimmer was so upset when word leaked last week that Shaun Hill would start the regular-season opener that he’s threatening not even to tell his team whether Hill or the recently acquired Sam Bradford will get the call on Sunday night against the Packers for the grand opening of U.S. Bank Stadium.

The Packers say they'll be prepared for Sam Bradford and Shaun Hill. Star Tribune via AP, USA TODAY Sports

“I don’t know if I will this week or not because it started leaking,” Zimmer said Wednesday on a conference call with reporters at Lambeau Field. “Usually I like to inform the team of everything that’s going on here and what I’m thinking, but I was a little disappointed that some of the things got out. We’ll just see how it goes. I may talk to them. I don’t know. Maybe I will.”

Less than an hour later, Packers coach Mike McCarthy said, “My understanding is that it’s probably going to be Sam Bradford.”

In the same breath, however, McCarthy said his team would be prepared for both quarterbacks.

Maybe he should consider a third possibility.

“I know exactly who’s starting,” Vikings running back Adrian Peterson said before announcing himself as the starter.

“The challenge for me is going to be just really looking at Green Bay’s defense and looking at their secondary. I’ve been practicing throwing the ball deep and everything. Once I’m back there, I’m just going to let loose.”

The last time the Vikings tried to pull a quarterback charade against the Packers was the 2012 wild-card playoff game – albeit with a different coaching regime – when they successfully hid Christian Ponder’s arm injury and surprised everyone by starting Joe Webb only to lose 24-10.

That doesn’t mean the Packers will prepare any differently this week.

“Well, it can’t make a difference,” McCarthy said. “That’s why you have preparation. We’ve taken the approach that we could see either one of the quarterbacks.”

Peterson is probably the more important factor anyway. The Titans held the All-Pro running back to just 31 yards on 19 carries last week.

“I think it’s part of your personnel evaluation; it’s part of your scheme evaluation,” McCarthy said. “You tilt toward certain schemes with one quarterback, as opposed to another. Those are the questions you ask through the game-planning process, but the fact of the matter is it’s going to start with giving the ball to Adrian Peterson. Every time we play the Vikings, that’s the focal point of our defense.”