Webb resumed practicing last week after missing the entire preseason with a lower back injury.
Webb has been taking part in drills all week, but is still displaying signs of stiffness when reacting to lower throws. Webb is still expected to play Sunday against the Cincinnati Bengals at M&T Bank Stadium.
Pierce had a mild concussion during the preseason, but says his symptoms, including sensitivity to light and dizziness, have subsided. He has passed an NFL baseline neurological exam. Pierce is slated to start against the Bengals.
Burfict was listed as dealing with heat isues. He had a hamstring problem listed Wednesday.
Linebacker Sean Porter (hamstring) and wide receiver James Wright (concussion) didn't practice again.
Rookie cornerback Darqueze Dennard (hip) was limited.