The Flyers have 11 forwards currently signed for the NHL roster. That number moves to 12 if Nolan Patrick is healthy and ready to go next season. So each forward spot is potentially taken if every player comes into the season healthy.
The Flyers also have a group of other forwards that will be looking to crack the roster. Looking at just the center position, Morgan Frost is a name that is not on the NHL roster at the moment. He will be fighting to prove that his time in the AHL helped him develop enough to make an impact on the Flyers.