Montreal, QC (SportsNetwork.com) - Philadelphia Flyers goaltender Steve Mason will be sidelined 2-to-3 weeks with a lower-body injury, general manager Ron Hextall announced Tuesday.

Mason is slated to undergo an arthroscopic procedure on his right knee to determine what has been causing him discomfort, CSNPhilly.com reported on Monday.

The knee buckled when Mason attempted to stretch at the bench during a timeout in the second period of Sunday's game at Washington.

Mason missed six games in January because of an injury to the same knee.

He is 11-12-7 with a 2.27 goals-against average and a .925 save percentage in 34 games this season.