Flyers defenceman Chris Pronger will be sidelined indefinitely with concussion-like symptoms.

Flyers general manager Paul Holmgren says Pronger has complained of a fairly persistent headache and sluggish feeling over the last few days. Pronger will visit with two concussions specialists Wednesday in Pittsburgh.

It's been a tough season for Pronger, Philadelphia's captain, who also missed six games with an eye injury.

He underwent surgery on his left knee last month and was expected to be out for another two weeks.