Mason and Emery have one of the more intriguing battles of the preseason as they tangle for a spot that has been unkind to many a Flyer over the years. Of course, the two could end up in a tandem, as well.
For now, the first step came Thursday when the Flyers opened training camp under fifth-year coach Peter Laviolette.
Mason has the chance to prove he's more the goalie who was the NHL's rookie of the year in 2008-09 and not the one who posted a goals-against average of 3-plus each of the next three seasons.
Emery, who played for the Flyers in 2009-10, went 17-1 with a 1.94 goals-against average for the Stanley Cup-champion Blackhawks in 2013, but was not a key cog in their title run.