Leafs are going to have an interesting challenge if Mrazek comes back anytime in the next couple of days....
Sandin at "2-3 weeks" isn't quite at the threshold of LTIR, so while he can be replaced on the 23-man roster, his cap hit cannot be.
Presumably, Spezza is going to be suspended for at least 3 games; no cap relief there.
If Mrazek comes back, before either of these 2; then Clifford & Anderson will both have to go back to the Marlies, leaving the Leafs 1 man short of 18 skaters. Then you compound that effect with Marner, for whom it's also pretty silent on.