It appears as though Philadelphia Flyers captain Chris Pronger will be out longer than expected.According to Nick Kypreos of Sportsnet.ca, the Flyers captain will be sidelined indefinitely. While there is no timetable as to his return, Kypreos went on to say via his Twitter account that Pronger's season "may be in jeopardy."Back on Dec. 9, Flyers general manager Paul Holmgren told reporters that Pronger "has struggled with other issues that are concussion-like symptoms."Pronger was out of the lineup for six games and 16 days after suffering an eye injury on Oct. 24 when he was hit in the face with the stick of Toronto's Mikhail Grabovski . He eventually rejoined the team and maintained his usual defensive role.In a 6-4 loss to the Winnipeg Jets on Nov. 19, Pronger actually played a season-high 26:41. In addition to his eye injury and concussion, Pronger also underwent arthroscopic surgery to clean out his left knee in the summer. He's been limited to 13 of the team's 29 games this season.Pronger met with Dr. Joe Maroon and Dr. Mickey Collins on Wednesday in Pittsburgh for further evaluation on his head injury."I just didn't feel well, I didn't know what it was," Pronger said on Dec. 9. "I never felt like that before with headaches and nausea, and that stuff. I had a concussion baseline test and passed that … I got lightheaded, had headaches, you're nauseous."