Simmonds, who scored his Flyers-best 28th goal in the first period, has a lower-body injury. He was hit in the left foot by a shot.
He has 50 points and is third in the League with 14 power-play goals.
MacDonald has an upper-body injury. The Courier-Post reported MacDonald's injury is to his right hand. He has 12 points in 58 games and averages 20:00 of ice time per game.
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