Studnicka was returned to AHL Lehigh Valley on Sunday, according to the NHL media site.
McDonald was recalled from AHL Lehigh Valley on Sunday.
York (upper body) was placed on injured reserve Sunday, per the NHL media site.
Foerster is questionable for Monday's game against Colorado due to a hand injury, per Jordan Hall of NBC Sports Philadelphia.
Couturier (undisclosed) didn't participate in Sunday's practice, Jordan Hall of NBC Sports Philadelphia reports.
Greig scored a goal on two shots in Thursday's 2-1 shootout win over the Islanders.
Woll stopped 24 of 26 shots in Thursday's 2-1 loss to the Red Wings.
Michkov scored a goal on one shot in Thursday's 2-1 loss to the Red Wings.
Ullmark turned aside 20 of 21 shots in regulation and overtime and all three shootout attempts he faced in Thursday's 2-1 win over the Islanders.
Zub picked up an assist while adding six blocked shots, one shot on net and a plus-1 rating in Thursday's 2-1 shootout win over the Islanders.
