Jeff Gross/Getty Images
1. Clay Matthews
One year after accumulating only six sacks, Matthews already has seven through the first quarter of the 2012 season. There have been times where the Packers outside linebacker has been nearly unblockable after racking up 2.5 and 3.5 sacks against the 49ers and the Bears respectively.
Even in games that he hasn't had multiple sacks, Matthews still leaves his mark on the game by pressuring opposing quarterbacks, hustling to chase down running backs and providing solid coverage. Matthews plays a complete game and probably trails only J.J. Watt in Houston as the NFL's best defensive player four games into the season.
2. Aaron Rodgers
Rodgers isn't having the the same type of season he had a year ago when he was named the NFL's MVP, but he's still an incredibly important piece of the Packers puzzle. Where would the Packers be without him? Probably at a record less than 2-2.
The biggest difference from a year ago is the absence of big plays, as Rodgers has only connected on a handful of passes longer than 30 yards this season and none longer than 49. Still, his second-half play has been remarkable this season, and he helped lead the Packers to a fourth quarter come-from-behind victory Sunday against the Saints.
3. Tramon Williams
Everyone will point to Williams' two-interception game against the Bears in Week 2 as the high point of his season as he helped limit Brandon Marshall to just two receptions for 24 yards. But Williams' performance in Week 4 may have been just as impressive.
With three pass deflections against quarterback Drew Brees, Williams helped preserve the victory for the Packers, highlighted by his coverage of the much taller Jimmy Graham on the Packers' goal-line stand. One blown coverage against the Seahawks and some spotty play versus the 49ers prevents Williams from being ranked higher.
4. Josh Sitton
Even though there's been inconsistent play to both the right and the left of Sitton, he remains the rock of the Packers offensive line. Whether it's been keeping Aaron Rodgers upright or opening up holes for Cedric Benson, Sitton has been up to the task.
Sitton has been the most consistent offensive lineman for the Packers and has helped the interior of the line become nearly impenetrable.
5. Jerron McMillian
Ever since being inserted as the Packers nickel safety midway through Week 1, McMillian has been one of the best safeties in the NFL, at least according to ProFootballFocus.com (subscription required). Granted, he hasn't seen as much playing time as some others, but the rookie has certainly made the most of his playing time.
Opposing quarterbacks have only completed a single pass when throwing in McMillian's direction, and when combined with his Week 2 interception, the opposition's passer rating throwing at him is 0.0. Perhaps that's why the Packers attempted to make a bigger role for McMillian against the Saints when he replaced D.J. Smith in their dollar defensive package with seven defensive backs.