Offensive coordinator Marty Mornhinweg had a grim assessment of his unit's performance Friday night against the Bengals, but said the problems are ones the team can correct.

"Last week, there was not much good there," Mornhinweg said. "We already started on getting some of those things corrected. I think there were some guys that played very hard, there were some that were thinking just a little bit too much, trying to do a little bit too much, and then, lastly, we just simply played poorly."

The team scored no touchdowns, though the starters had a score called back by an illegal formation penalty.

Mornhinweg would not single out any position, even when reporters asked about the play of the offensive line, which produced few holes for running backs and allowed pressure on Kevin Kolb.

"I think we're going to be fine," he said about the line. "There was no position that really played at a high level, and that's what I was disappointed in."

He added: "I think our offensive line has a bright future here. They can be one of the very best in the league."

Mornhinweg also said the team may have a few red-zone wrinkles it can roll out for the regular season that it hasn't used in the two preseason games.

"In the preseason, we don't show them much at all," he said. "It'll be a little different [than the past] because we have a quarterback with different strengths than Donovan [McNabb], we've got some other players with a little bit different strengths."

Akers aching?

Kicker David Akers sat out the afternoon practice Monday with a heel injury, according to the team. The Eagles would not disclose any more information about the injury.

Akers also sat out one day at training camp with what the Eagles described as a heel contusion.

In his place, punter Sav Rocca booted field goals Monday, with sure-handed wide receiver Jason Avant holding. (Rocca usually holds.)

Rocca's kicking motion appeared a bit labored, but his power was there as he made field goals of 38, 40, 42 and 44 yards, before missing from 45.

Extra Points

Center Jamaal Jackson was once again practicing although he did not participate in 11-on-11 drills. Mike McGlynn continued to deliver snaps with the first team while Nick Cole sat out practice with a knee injury that the team has described as "soreness" . . . Guard Todd Herremans was a full participant in the afternoon practice open to the media . . . Center A.Q. Shipley returned to practice after hurting his left knee against the Bengals.

Contact staff writer Jonathan Tamari at 215-854-5214 or jtamari@phillynews.com.