The Maple Leafs are likely to add some kind of player between now and the NHL trade deadline on March 3. The first question shouldn’t be who, but how much can they spend. Leaving aside the issue of the draft picks and players a team has to give up to get a player in trade — and pay for salary retention on top of that, doubled up perhaps — the cap space has to exist to add the player to the roster.
On March 3, in the morning — so before the trade deadline at 3 pm — the 23-man roster limit goes away.