Chernyshov (upper body) is week-to-week, per Sheng Peng of San Jose Hockey Now on Saturday.
Chernyshov suffered an injury in Thursday's 6-2 win over Ottawa, and he is facing an extended absence. He has earned two goals, four points, 12 shots on net, seven blocked shots and six hits in 11 appearances this season. With Chernyshov unavailable, Collin Graf is projected to skate on the top line against Boston on Saturday.