With Murray being sent down to the Marlies on a conditioning stint, it means the Leafs won't have to activate him until after the regular season when his $4.68M cap hit doesn't count against the salary cap. The stint with the Marlies also means that Murray could, although highly unlikely, make a return to the Leafs' crease at some point during the playoffs. Of course, that would only happen if things went sideways with Ilya Samsonov, 
Joseph Woll and Martin Jones.