GREEN BAY – A house is only ever as good as its foundation, which is why for the first time this season the Green Bay Packers have noticeably wobbled.

It wasn’t the 27-13 defeat at the hands of the Philadelphia Eagles Sunday afternoon at Lambeau Field that did it. Losses happen. Nor was the need for the third string quarterback after 10 plays of Seneca Wallace. Scott Tolzien threw for 280 yards and completed 61.5 percent of his passes. Rather, it was the injuries to center Evan Dietrich-Smith, and then right tackle-turned right guard Don Barclay, that unsteadied the fortress.

Aaron Rodgers may be king of the castle when it comes to the Packers offense, but it doesn’t work – it can’t work – as well when that castle shakes at impact.

"A lot of moving parts and it’s not something that just kind of goes together easily," said Marshall Newhouse, who came off the bench for the second straight week to play right tackle. "A lot of people have to change and do a lot of different things. I think for a while we preserved pretty well but obviously we still expected to win, so it’s rough."

The Eagles came in to the game with the worst ranked defense in the NFL, allowing just under 420 yards per game, but they were allowed to aggressively crash defenders down to the line of scrimmage, first because of Wallace, and then because of Tolzien. Then, Dietrich-Smith was lost to a knee injury, forcing Lang to center.

Now, Lang often snaps to every quarterback on the roster as a precaution during the week – but he missed this week of practice due to a concussion he suffered on Monday night.

Then, Barclay was lost with a knee injury, bringing Lane Taylor in to play right guard. Not since head coach Mike McCarthy flipped Bryan Bulaga and Josh Sitton to the left side and Lang to the right at the start of training camp has the core group of the offense been in such flux.

The effects were most felt in the running game, as Eddie Lacy was held to just three yards per carry and 73 yards on 24 attempts. Despite the Packers trailing only 7-0 after the end of one quarter, the rookie running back only had 14 carries for 39 yards over the final three quarters.

As a team, the Packers rushed for 99 yards on 30 carries.

That said, Lacy felt the lack of explosiveness in the run game was more of a result of being simply outmanned in the trenches as the Eagles stacked defender on top of defender.

"It’s difficult," Lacy admitted. "There are a lot more guys in the box, safeties coming down faster, it’s real difficult. But, it’s where we’re at right now and it’s what we’re going to have face for the next few weeks. Somehow we just have to make something happen to give the offense the boost and be able to make the play-action pass work."

Fresh off two straight losses, veteran cornerback Tramon Williams acknowledged nerves are raw – but those will heal over come Monday morning.

"I think we still have confidence," he said. "I think we still know we have the players. I don’t think many guy’s confidence will go down too much."

"We’re a good team," added Bakhtiari. "We just need to be healthy enough to go out there and effectively play."

Lang stressed accountability, and to a man his teammates echoed that call. Clay Matthews, despite being impeded by a large club on his right hand, said it was on him, and the defense, for allowing 17 second half points. Newhouse said he hasn’t played as well as he should have coming off the bench. Lang said he wasn’t good enough as a center, despite having no work this week.

Sitton said, simply, there are no excuses.

From a resolve standpoint, the Packers seem as strong as they were at the start of week one.

Each individual player, or position group, will once again vow to improve, to be better than this week or the week before.

They may well do that, too. On Sunday, the receiving corps of Jordy Nelson (6 catches, 56 yards), Jarrett Boykin (8 catches, 112 yards), James Jones (4 catches, 44 yards) and even backup tight end Brandon Bostick (3 catches, 42 yards, TD) all elevated their game to assist Tolzien.

Rookie defensive end Datone Jones had two sacks, and it’s hard to imagine that Tolzien wasn’t better this week, despite two interceptions and a pedestrian 70.5 quarterback rating than he was last week as a practice squad player.

That resolve will be truly tested once the severity of the injuries to Dietrich-Smith and Barclay are determined in the coming days, however. If the offensive line remains in flux (a group that may include the recently-activated Derek Sherrod, as well), it means the Packers march forward on shakier ground.