With McNabb, unbeaten Eagles flying high, getting better

As strange as it sounds, Philadelphia has room for improvement.
PHILADELPHIA (AP) -- Here's a scary thought for the rest of the NFL: the Philadelphia Eagles aren't playing their best.
The offense isn't clicking inside opponents' territory and the defense is vulnerable against the run. Still, the Eagles are dominating teams, winning their first five games by an average margin of 14.8 points.
Despite a second straight subpar performance from Donovan McNabb and the offense, the Eagles beat Carolina 30-8 on Sunday.
They're 5-0 for the first time since starting 6-0 in 1981. They've trailed for only 7:36 this season, have led after each quarter, and are the only team to win each game by double digits.
Work in progress
But there's room for improvement, especially on offense. The Eagles have scored only three offensive touchdowns and settled for seven field goals in the last two games.
"Offensively, I've got to do a better job of putting our guys in position," Eagles coach Andy Reid said Monday. "We need to run the ball better. We've got to look at that. That wasn't up to par."
Brian Westbrook finished with 64 yards rushing on 13 carries against the Panthers, but he had just 22 yards before breaking a 42-yard touchdown run on his last carry.
"Brian is not a secret anymore," Reid said. "I think people know who he is and what he can do, so that will be the challenge for the offense to make sure he can be productive each week."
McNabb, off to the best start of his six-year career, was just 14-of-26 for 209 yards, one interception and didn't throw a TD for the first time this season. He has struggled in the second half of the last two games, completing 11-of-24 passes for 82 yards, two interceptions and no TDs.
Terrell Owens had four catches for 123 yards in the first half against Carolina, but didn't get another reception.
"We're seeing a softer coverage in the second half," Reid said. "I need to go back through and make sure I'm calling the right plays for the guys so they can execute them."
Overall, the offense has scored 130 of the team's 137 points, an average of 26 points per game. Except for the second half of the last two games, McNabb has been outstanding, throwing for 1,377 yards, nine TDs and two interceptions and running for two scores.
Defense is key
Meanwhile, the defense has been better each week, allowing fewer points in every game. They had a shutout for 57 minutes against the Panthers, before giving up another meaningless score. Of the 63 points scored against the Eagles, 34 have come in the fourth quarter, when the outcome already was decided.
The only defensive negative against Carolina was that the Eagles allowed 158 yards rushing. The defense gave up just 187 yards on the ground in the three previous games combined.
"There's definitely room for improvement," linebacker Dhani Jones said. "As a defense, we're always keying in on the amount of rushing yards that an offense has. I know it was over 100 yards and we're not satisfied with that."