Flyers GM Paul Holmgren believes Chris Pronger will return to the lineup "within four weeks" if not sooner. Given all that Pronger has already been through this season with an eye injury and a recent virus, one cannot help but wonder about any time table with respect to this latest setback. The club announced Monday that surgery will be performed on the captain's left knee. For those keeping score, it will mark his fifth surgical procedure in the last 16 months.