Willie Parker and Casey Hampton returned to practice today and looked good. There's no reason to believe they should not be able to play Sunday.
Troy Polamalu was also practicing. I spoke with him afterward and he seemed normal. I don't see any reason why he won't be able to play as well.
As I've been reporting, don't look for Marvel Smith to play this week. He did not practice again Wednesday and was nowhere to be seen before or after practice. I even asked the PR staff to speak to him and nobody knew where he was - at least that was their story.
Team doctors were on hand at practice, though – something that's not unusual - and Smith was likely with them.