Philadelphia Flyers defenseman Andrej Meszaros is expected to miss at least one month due to an injury to a muscle near the AC joint in his left shoulder, according to general manager Paul Holmgren on Friday afternoon.

Meszaros appeared to sustain the injury at the end of the second period in Thursday night's 2-1 victory over the New York Rangers. New York captain Ryan Callahan administered a hit to Meszaros in the closing seconds of the frame. After time expired, Meszaros returned to the bench huddled over and quickly made his way down the tunnel towards the team's dressing room.

He was unable to return to the contest.

Meszaros was seen post-game with his left arm in a sling, but the defenseman was unwilling to answer questions at the time. On Friday, the team announced that they had recalled Andreas Lilja from the American Hockey League's Adirondack Phantoms and that Meszaros would be seeing a doctor.

Frank Seravalli of the Philadelphia Daily News tweeted that he interpreted Holmgren's timeline of a one month absence as a best case scenario. He also noted that Meszaros has had issues with his left shoulder in the past, undergoing surgery on the area in March of 2009.

As of Friday, the plan is to have Meszaros undergo a four-week rehab program to help heal the area. Surgery was not mentioned by Holmgren.