The 24-year-old, the league's biggest drawing card, was cleared for contact last month after being sidelined since January by a concussion.
"He had a good week of practice and is progressing, but he won't be playing this weekend," Penguins coach Dan Bylsma was quoted as saying by the team's website (http://penguins.nhl.com).
"We're not keeping a secret. When he plays, we'll make sure we let you know."
"From a coach's standpoint, we're not looking for an indicator on the ice that says Sidney can play," Bylsma said.
"He looks great, he flies around, but in terms of the progressing and the rehab the doctors have set out, going through that step, practicing with people, we definitely want to go through that process."
(Writing by Mark Lamport-Stokes in Los Angeles; Editing by Steve Ginsburg)