Captain Chris Pronger has "concussion-like" symptoms, and rookie center Brayden Schenn has a mild concussion, the Flyers announced. They are out indefinitely.
Said GM Paul Holmgren: "While Chris' knee is improving, he has struggled with other issues that are concussion-like symptoms. Chris will see Dr. Joe Maroon and Dr. Mickey Collins on Wednesday in Pittsburgh for further evaluation."
Collins and Maroon treated the Penguins' Sidney Crosby.
Holmgren said he had no plans to deal for a defenseman.
"We have seven defensemen now that are healthy and we're happy with their play," Holmgren said. "I like the way the young kids are playing on defense and don't really feel the need to rush into anything."
He acknowledged he talks to general managers "every other day," but that a trade was not imminent.
According to Holmgren, Pronger "has had fairly persistent headaches and just a sluggish feeling, so we're trying to do the right thing here and get him checked out by the doctors in Pittsburgh and see what we're dealing with."
The Flyers originally thought Pronger had a virus, but the problem may have been concussion-related.
"I don't know if we'll ever know" if it was a virus, Holmgren said. "We didn't know what we were dealing with then, and I'm not sure we do now. But concussion-like symptoms continue to persist and we're going to get him checked."
Pronger, 37, originally passed a concussion test, but his headaches continued, Holmgren said. He has not had any other concussion tests.
Pronger had minor surgery on his left knee on Dec. 2, his fifth operation in 16 months. He has played in just 13 of the team's 27 games.
The Flyers are hopeful Schenn can practice next week. Schenn said he has been experiencing "off and on" headaches since he was hit by Raffi Torres in Phoenix on Saturday.
Schenn has missed the last two games.
"We'll keep him shut down through the weekend and see how he is Monday," Holmgren said.
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The Flyers are 9-4-1 without Pronger this season, and 8-3-2 with him.
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Brendan Shanahan, the NHL's dean of discipline, visited the Flyers in Voorhees on Friday and talked to them about several issues, including what constitutes a suspension.
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Follow Sam Carchidi on Twitter@BroadStBull.
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