Cullen is nursing an undisclosed injury and will be a game-time decision for Tuesday's game against the Canadiens, Adam Vignan of The Tennessean reports. Cullen was present for Tuesday's morning skate, but he missed Monday's practice for what was deemed to be maintenance purposes. Though Cullen didn't take part in line rushes at the morning skate, he was generally expected to fill in for Viktor Stalberg, who left the session with the injury. However, the Predators' emergency recall of Kevin Fiala suggests both Cullen and Stalberg are now both at risk of sitting out Tuesday's tilt with injuries. Cullen's status likely won't be made clear until the Predators conduct pregame warmups a half hour before the 8:00 ET puck drop.