The officials handed Fiala a five-minute major for boarding and a game misconduct after he leveled Roy from behind in the second period.
The Kings' training staff attended to Roy on the ice before his teammates helped him to the dressing room.
Los Angeles head coach Todd McLellan said postgame that Roy is still being evaluated. However, the bench boss expects the blue-liner to be able to travel with the team.
Fiala scored his third goal of the season in the opening frame.