Grzelcyk is dealing with an upper-body injury and will be a game-time decision vs. the Kings. If Grzelcyk can't go, look for Jack Ahcan to slot back in and take his place on PP2.
Hayes had an infection in his groin area and underwent a third procedure, which has kept him out since January 17th. Hayes will be back on the Flyers' third line and second power-play unit on Saturday.
Hayes has been out since January 17th but took part in Thursday's optional morning skate and is a "possibility" to return to the lineup on Saturday. Hayes has appeared in just 20 games this season, scoring three goals and six assists (nine points).
Gauthier was an undrafted free agent goalie out of the WHL. The 21-year-old netminder has gone 20-6-0 with a .932 SV% in 28 games with Prince George and Portland this season.
MacArthur is an undrafted free agent out of the QMJHL. MacArthur is in his third QMJHL season and has scored 25 goals with 18 assists (43 points) in 26 games with Acadie-Bathurst Titan.
Karlsson skated again on Wednesday and the Sharks are hopeful that he could be back in the middle of March. Karlsson underwent surgery to repair a muscle tear in his left forearm on January 24th.