The Toronto Maple Leafs face a major task after moving on from Mitch Marner in a sign-and-trade deal completed with the Vegas Golden Knights on the verge of free agency. Leafs general manager Brad Treliving knows the challenge of replacing Marner's production won’t be solved in a single transaction,

With Mitch Marner no longer part of the Toronto Maple Leafs, expectations will only grow for Leafs centerpieces Auston Matthews and William Nylander. NHL insider Dave Feschuk appeared on TSN's "First Up!