There seems to be a common problem with most (60%) NHL teams.
www.thestar.com
This year, 16 teams are already using Long-Term Injury Replacement — including the Maple Leafs — which means they are at or over the cap, according to capfriendly.com. Twelve are projected to have no cap space. Another eight are projected to have less than $300,000 in cap space by the end of the season.
That means there's very little room to make blockbuster trades or add significant salary. It can be done of course, but it usually would mean multiple partners who would retain salary along the way before the main player lands with his playoff-bound team.

Kevin McGran: 13 Musings: Half of NHL teams have no cap room to make trades
We touch on Sheldon Keefe coaching the Leafs, Brendanan Shanahan’s player discipline videos, and that time my Alexa tried to answer my question of Alexis Lafrenière.
This year, 16 teams are already using Long-Term Injury Replacement — including the Maple Leafs — which means they are at or over the cap, according to capfriendly.com. Twelve are projected to have no cap space. Another eight are projected to have less than $300,000 in cap space by the end of the season.
That means there's very little room to make blockbuster trades or add significant salary. It can be done of course, but it usually would mean multiple partners who would retain salary along the way before the main player lands with his playoff-bound team.