Rasmus Sandin will be placed on LTIR and is likely to miss weeks, not days per a report. The injury, thought to be to his knee, happened in the recent Nashville game prior to the deadline.
The exact injury event is a bit of a mystery at this point. He played very little after being on the ice for one of the third period goals against, but did have one shift late in the third, and was on the ice at the end of the game.
In return the Leafs seem to have given the Predators a defenceman.