Hagg will be a healthy scratch on Thursday.
Hagg (lower-body) will be back in the Flyers lineup on Sunday.
Hagg will miss two weeks with a lower-body injury.
Hagg must have suffered an injury in Boston on Thursday and will miss at least two weeks. With Johnny Oduya (undisclosed) also hurt, Travis Sanheim has been recalled from Lehigh Valley (AHL) and will play on Saturday.