Cernak did not return to Thursday's game versus the Flyers after blocking a shot in the second period, Eduardo A. Encina of the Tampa Bay Times reports.
There was no update on Cernak's status after the game. The 27-year-old's heavily defensive playing style often leads to him needing attention at times during games. He'll have the benefit of an extended break in the schedule for the Lightning -- their next game is next Thursday versus the Jets.