Mason (undisclosed) didn't make the trip with the Flyers to Toronto on Friday, Sportsnet's Chris Johnston reports. This would rule Mason out as an option for Saturday's game, as backup Ray Emery assumes the starting role while Rob Zepp figures to receive a call-up from AHL Lehigh Valley to serve as the No. 2 goalie. Mason remains under evaluation by team physicians after he required assistance off the ice during Friday's practice. The Flyers expect to have more information on his condition later in the day.