Parker thought he was coming back following the bye week, but he aggravated the MCL sprain last week when he stepped in a hole at practice. He missed Sunday's game in Cincinnati, which was the third straight absence for Parker.
"I'm just frustrated," is all Parker would say after missing all but the early drills in Thursday's workout.
It's doubtful Parker will recover in time for Sunday's game against the New York Giants, so Mewelde Moore would receive his third consecutive starting assignment. Moore rushed for 219 yards on 37 carries in his two starts and also caught eight passes for 31 yards.
BIG AA OUT AGAIN
Aaron Smith missed his second consecutive practice for personal reasons. Steelers Coach Mike Tomlin swore Smith's teammates to secrecy, but some did allow that he and his family are fine.
Brett Keisel returned from his absence for personal reasons, but sprinted off the field after practice and left the locker room before reporters arrived.
For the Giants, Plaxico Burress (shoulder) missed his second practice of the week, but is expected to play. Starting outside linebacker Gerris Wilkinson (knee) also missed his second practice, while starting left tackle David Diehl (back) returned to practice, but in a limited capacity.
The Steelers and Heinz Field management are warning fans about counterfeit tickets.
"We have received information that indicates we can expect some scalpers to be selling counterfeit tickets to Sunday's game," said Steelers spokesperson Dave Lockett. "It's hard to tell the difference between some counterfeit tickets and the real thing."
"Well, the last time I looked there haven't been very many completed passes when the quarterback's lying on the ground."
* Linebacker Larry Foote on the extras involved when playing the defending champs:
"Ticket requests. I mean so many people picked this game, my friends and family. But they're 5-1. They've got a good team. Ain't no doubt about it. Naturally we're a little more extra pumped for this game."