That's the issue: Marner has to waive his no trade clause. Only way he does that is if the team acquiring him signs him to a huge deal. And then the Leafs have to find a trade partner that is willing to deal away a top offensive defenseman (not draft picks) to get him. That's going to be very challenging. It's not out of the realm of possibilities that they trade away Marner for less than fair value and miss the playoffs without his regular season production. You can't expect Matthews to get them in the playoffs by scoring 60+ goals every season.