:49 in the 4th quarter

A fourth-down pass breakup by 49ers safety Culliver on a pass intended for wide receiver Jordy Nelson has preserved the win for San Francisco.

All the Niners have to do is kneel down until the clock runs out.

2:00 in the 4th quarter

Aaron Rodgers has a reputation of not being able to direct fourth-quarter comeback wins.

He has an opportunity right here.

At the two-minute warning, he's done some dinking and dunking on the current drive, but still has a ways to go.

49ers safety Donte Whitner almost had a pick-six and could really use a turnover.

3:56 in the 4th quarter

With 2.5 sacks on the day, linebacker Clay Matthews has given the Packers some hope.

There's still a lot that needs to go right, both a touchdown and a two-point conversion. But the game still hangs in the balance.

6:00 in the 4th quarter

The Packers still have a chance, but they're going to need a stop on defense and another touchdown and another two-point conversion. That's a lot of things that need to go right and it won't be easy.

8:52 in the 4th quarter

Just when the Packers appeared as if they might be getting back into the game, quarterback Aaron Rodgers was intercepted by 49ers linebacker Navarro Bowman deep in Packers' territory.

That may not be "the dagger," but it certainly has made it that much tougher on the Packers.

10:00 in the fourth quarter

While praising Randall Cobb for his return abilities, it's also worth pointing out that the 49ers may have gotten the short end of the stick when there appeared to be a block in the back by Terrell Manning of the Packers.

It certainly appeared as if that block was worthy of penalty even if another by Brad Jones of the Packers was not.

11:16 in the 4th quarter

It was the season opener a year ago when Randall Cobb exploded onto the NFL scene with a record-tying 108-yard return for a touchdown against the New Orleans Saints.

Cobb is making another big impact in this year's season opener both on offense and on special teams.

13:52 in the 4th quarter

After trading punts their past few possessions, the Packers and the 49ers are pretty much in the same place they were after the last 49ers touchdown.

The one problem for the Packers, however, is that they're starting to run out of time. They need both stops on defense and for their offense to come alive.

For the 49ers, it's time to get some first downs and milk the clock.

End of 3rd quarter

Packers tight end Jermichael Finley had a pair of drops in the third quarter that shows his issues from last year have yet to be put behind him.

Finley had a few nice catches in the first half to help the Packers, but so far in the second half, he's only hurting them.

1:37 in the third quarter

As a point of evidence as to how much success the 49ers offense has had through three quarters, or how poorly the Packers defense has played, Wes Hodkiewicz of the Green Bay Press-Gazette points out via Twitter, "Bush stops Crabtree shy of first down, first punt for Andy Lee since 49ers' first series."

4:36 in the 3rd quarter

After an impressive punt by punter Tim Masthay, the Packers have pinned the 49ers inside the five-yard line late in the third quarter.

For the 49ers, they have a chance to put the game out of reach for the Packers.

On the other hand, if the Packers can finally get a stop on defense, they may get some momentum heading into the fourth quarter.

9:08 in the 3rd quarter

Alex Smith found Vernon Davis on a 29-yard receptions to get the 49ers into scoring position mid-third quarter.

Davis found the hole in the zone, and it looks a whole lot like the same issues that plagued the Packers on defense a year ago.

13:25 in the 3rd quarter

After having one of the most prolific offenses in the NFL last season, the Packers are having their share of struggles on opening day.

After having to punt the ball away on their first possession of the second half, the Packers only have 147 yards of offense thus far.

To be sure, it's partially the product of a good showing by the 49ers defense.

Halftime

The San Francisco 49ers went 0-3 on third downs in the first half, but still had 14 first downs total.

That's good news for the 49ers, but bad news for the Packers who were allowing plenty of first downs before the Niners even got to third down.

For a little perspective, Bill Huber of Packer Report noted via Twitter that the Green Bay Packers tied for the fewest penalties in the NFL last season.

This afternoon, the Packers have nine for 67 yards so far. That's obviously not helping matters as they trail the 49ers by at least two scores at halftime.

:11 in the 2nd quarter

Colin Kaepernick, out of the Wildcat formation, has the 49ers in position to possibly get a field goal after a 17-yard scramble.

Just when it looked like there may be no more scoring in the first half, the 49ers have an opportunity to put some points on the board with a little luck.

2:00 in the 2nd quarter

There have been few if any sightings of veteran Packers wide receiver Donald Driver.

The Dancing With the Stars champion is active today, but is receiving far fewer snaps than the other wide receivers on the roster.

It's going to be tough for the Packers to keep him on the active roster going forward if he's not going to play.

2:47 in the 2nd quarter

Penalties have been an issue for both teams. The 49ers have four penalties for 45 yards, but the Packers have been even worse with seven for 57.

4:40 in the 2nd quarter

The Packers' running game may not be going anywhere, but Aaron Rodgers is doing a good job of distributing the football.

Jermichael Finely, Greg Jennings, Jordy Nelson and Randall Cobb all have at least two catches and the second quarter isn't even over.

7:13 in the 2nd quarter

Aaron Rodgers has had himself an efficient day so far by completing 12 of 15 passes for 95 yards so far, but he's been outdone by Alex Smith. Smith has completed eight of nine passes for 90 yards and a touchdown.

Multiple penalties on the defensive side of the football aren't helping the Packers.

A pass interference call on Jarrett Bush and a roughing the passing penalty on Clay Matthews are helping the 49ers driving down the field.

Start of 2nd quarter

Not a lot of offensive fireworks by either team so far. Both teams have moved the ball in spurts, but have been done in by giving up sacks or other errors.

1:20 in 1st quarter

The Packers have committed to trying to establish the run with Cedric Benson with five rushes in the early going, but so far, he's only gained 11 yards.

The Packers would probably more than happy if Benson can help open up the play-action pass, and he did once, but Aaron Rodgers couldn't connect with James Jones on a deep pass on their second possession of the game.

4:58 in the 1st quarter

In driving down the field to their first score of the game, a field goal by David Akers, the 49ers completed multiple underneath passes to both Michael Crabtree and Randy Moss.

The 49ers appear to be targeting a few of the weaker links in the Packers' back seven, linebacker A.J. Hawk and cornerback Jarrett Bush.

9:11 in the 1st quarter

Carlos Rogers sacks Aaron Rodgers on a third-and-11, and the Packers must punt the ball away.

Both teams trade punts on their first possession. Little offensive success by either team thus far.

And any little success the Packers had, were negated by penalties and miscues.