No one is compelling anyone to do anything. It’s not like Toronto would be giving up picks and prospects for said defenceman. They would be giving up gardiner(if they can’t re-sign him) for another defenceman. Teams that could use an offensive defenceman might want to make that trade. If there is no deal there to be made then you hold onto him for the playoff run.I see these kinds of deals suggested all the time but how often do they happen? Why would another team feel compelled to swap a d-man for Gardiner? Teams generally hoard that position, especially younger/cheaper players.