Coach Peter Laviolette wouldn't give an update on when Pronger will return.
"I can't shed absolutely any light on that," Laviolette told NHL.com. "Not allowed."
The 36-year-old defenseman, out with a broken hand, remained on the ice after the Flyers' morning skate Wednesday taking part in a conditioning scrimmage with three players who haven't seen playoff action yet, plus two assistant coaches.
The Flyers lead the Eastern Conference quarterfinal series 2-1.