I'm very cautiously optimistic about Mason this season, mostly because I picked him up cheap last summer in my league so I'm hoping he can pick it up a bit. I've read that he's taking this year a little more seriously and with a legit goalie sharing the crease in Columbus maybe Mason realizes it's time to pick his game up before he Jim Carrey's out of the NHL.
To actually answer your question, I think he might be a safe play tonight against Phoenix but I wouldn't go out of my way to grab him and start him. If he's on your roster, and you need a goalie start go for it but I wouldn't go streaming for him.
20 Team Dynasty (points per) - G (25, 50 for defense) A (25) PIM (3) +/- (5) PPG (15) SHG (25) OTG (15) GWG (25) HTr (50) GP (2) HIT (1) BLK (2) Use actual NHL salary
F: Malkin, Tavares, P. Kane, Neal, Nash, Okposo, Moulson, Ott, Whitney, Iginla, Pouliot, Garbutt, M. Martin, Stajan, Raffl, Klinkhammer, Clune
D: Green, Ekman-Larsson, Bogosian, Gudas, Stone, Oduya, Ranger
G: Anderson, Lehner
Farm: Grimaldi, Gaudreau, Hurley, Hartikainen, Stransky, Fast, Tarasov, Petrov, Kosov, Kujawinski, Maidens, Nurse, Ceci, Donovan, Ekholm, Thrower, Kichton, Borowiecki, Marchenko, Poulin, Nilsson, Andersen