PHILADELPHIA -- A weekly look at what the Philadelphia Eagles must fix:

The Eagles will face a San Francisco 49ers team in Week 4 that is 1-2 and on the brink of serious dysfunction this season.

That makes it important for the Eagles to put some pressure on San Francisco quarterback Colin Kaepernick. Nothing disrupts an offense or discourages a quarterback like getting sacked, and the Eagles just haven’t been doing that. They sacked Jacksonville’s Chad Henne three times in the season opener, but Washington sacked Henne 10 times a week later. The Eagles had zero sacks last Monday night in Indianapolis and zero sacks Sunday against Washington.

“You always want to get the sacks,” Eagles coach Chip Kelly said. “But can you get him off his spot and change where he's throwing the football and can you cause an incompletion? That's just as good at times as getting the sack and getting the quarterback down.”

Annoying a quarterback is one thing. Actually tackling him for a loss, turning a pass play designed for big yardage into a negative play, is something else. The Eagles’ pass defense was ranked dead last in the league last season. It is ranked 30th after three games this season. The lack of pressure isn’t the only reason, but it’s one.

Getting linebacker Mychal Kendricks back would help. Kendricks can rush the passer from his spot inside. Outside linebackers Trent Cole, Connor Barwin and Brandon Graham are going to have to step up their game a bit.

But it may be that defensive coordinator Bill Davis will have to deploy some blitzes in order to be more disruptive. Davis has tried to stay away from those high-risk, high-reward tactics for obvious reasons. Safeties Malcolm Jenkins and Nate Allen are capable of getting to the quarterback. Jenkins could also slide over and cover a receiver if one of the cornerbacks were to blitz. However they do it, the Eagles must do more than mildly inconvenience Kaepernick in this game.