The Green Bay Packers are unbeaten with a 4-0 record and the St. Louis Rams are 2-2 and handed the Arizona Cardinals their first loss of the season last weekend.

The Packers are aiming to win their 12th straight home game, while the Rams are hoping to go on the road and give the Packers their first loss of the year.

Aaron Rodgers is really good at home for the Packers. Rodgers hasn't thrown an interception at home since 2012. The defense is clicking for Green Bay, too. Clay Matthews and the Packers' defensive unit have sacked opposing quarterbacks 13 times in their last two games against Kansas City and San Francisco. Nick Foles has been sacked six times for St. Louis. For the Packers, Sam Shields is also coming on, as he has an interception in each of the last two games.

Green Bay's defense will have to give their best effort again Sunday, as Todd Gurley and Tavon Austin both had big performances last week against the Cardinals. Gurley ran for 146 yards and Austin hauled in 96 yards and two touchdowns. The Packers' defense has allowed the last three running backs they've faced to run for under 100 yards. (Marshawn Lynch had 41 yards, Jamaal Charles rushed for 49 yards and Carlos Hyde had 20 yards). 

The biggest task for the Packers is going to blocking the Rams' defensive front led by Aaron Donald. Donald's already has 3.5 sacks, Robert Quinn has three, and as a team, St. Louis has racked up 17 sacks. Green Bay's defensive has recorded 17 sacks in their first four games as well. Matthews and Nick Perry each lead Green Bay with three sacks apiece. The Packers' offensive line has allowed six sacks like the Rams' offensive line has. Bryan Bulaga has been limited in practice this week for Green Bay after missing the last few games.

So, the battle in the trenches very well could be the difference in the game with both St. Louis and Green Bay having 17 sacks defensively and each allowing its quarterbacks to be sacked six times.

Injury Report: 

Packers: Jayrone Elliot was a full participant in practice this week, while Bulaga, Randall Cobb, Demetri Goodson, James Jones, Matthews and Sean Richardson have been limited in practice and Davante Adams, Morgan Burnett and Jake Ryan did not practice Wednesday and Thursday.

Rams: Chase Reynolds and Eugene Sims were full participants in practice this week, while Maurice Alexander and Alec Ogeltree did not practice Wednesday and Thursday.

Sam Tastad will have stories on the Packers all season with pre-and-post game previews. Follow him on Twitter @samtastad and email him at tastadsam@gmail.com.