Toronto has to be thrilled by the production of their first - year players so far .
A key contributor to the Maple Leafs victory was rookie Mitch Marner , who added three assists in the win .
Maple Leafs has to be thrilled by the production of their first - year players so far .
A key contributor to the Maple Leafs victory was rookie Mitch Marner , who added three assists in the win .