Wade Allison is expected to be out until after the NHL All-Star break with an MCL injury.
The forward injured his knee in his season debut Saturday, a 6-3 loss to the Buffalo Sabres, and did not play after the second period. He sustained a high-ankle sprain during rookie camp in September and scored four points (three goals, one assist) in seven games for Lehigh Valley of the American Hockey League when he returned to play Dec. 11.
The Flyers resume their schedule after the All-Star break against the Detroit Red Wings in Philadelphia on Feb. 9.
Forward Zack MacEwen is questionable against the Dallas Stars on Monday (7 p.m. ET; NBCSP, BSSW, ESPN+, NHL LIVE). He sustained an undisclosed injury Saturday and did not practice Sunday.
Derick Brassard continued his rehabilitation of a hip injury off the ice Sunday. The forward has missed 22 of 24 games since Nov. 23.
"Just nudging him along," Flyers coach Mike Yeo said. "Basically, doing what he can do as far as trying to get the conditioning back and making sure that we push it near the limits, but not past the limits, of what he's capable of."
Yeo said forward Sean Couturier (upper body) and defenseman Ryan Ellis (lower body) have not started skating. Couturier has been out since Dec. 18. Ellis has played one game since Oct 20.
"I really don't have a timeline for them to even get on the ice as far as even getting into non-contact drills, even just to begin skating, let alone the conditioning and everything else that goes along with it," Yeo said. "I can't even begin to guess at what time that is. Obviously the first step is to get a timeline as far as when we can start to expect them on the ice, and then from there we can determine when they're going to be ready to play." -- Adam Kimelman