Two of the Eagles' five starting offensive linemen from Thursday night's preseason opener were held out of practice Saturday morning as Ryan Harris (lower back spasms) and Jamaal Jackson (knee tendinitis) were given time to rest. Jason Kelce and King Dunlap took the first-team reps at center and right tackle in their absence. The team is being extra careful with Harris, who has had back problems before.

"He's had work done on his back before, so we're just going to make sure we check this thing out, and that it's right," said head coach Andy Reid. "But right now it looks like it's not too serious. We'll just see how it goes."

During practice, defensive end Juqua Parker hurt his calf and was held out of the rest of practice. Newly signed wide receiver Steve Smith took part in the conditioning drills away from the practice field after officially being placed on the Physically Unable to Perform list. Joining Smith and the rest of the PUP Eagles was defensive tackle Mike Patterson, who suffered a seizure about a week and a half ago. Reid said that Patterson has been cleared to partake in fitness work.

"He's been cleared to do conditioning. We're just holding off on the other part," said Reid. "It'll probably be a week or so as we're looking at it now. It gives the doctors a chance to continue to evaluate him and for him to get back to where he feels he can get back out there and play."

Meanwhile, third-year wide receiver Jeremy Maclin remains in St. Louis undergoing tests for an undisclosed illness. Reid said there were no new developments on Maclin's condition.