Marner signed an eight-year contract extension worth an average annual value of $12 million

The Core Four is no more in Toronto. Mitch Marner has been dealt to the Vegas Golden Knights in a sign-and-trade, and the Maple Leafs have no time to lose in the hunt for his replacement.

The Toronto Maple Leafs signed and traded star right winger Mitch Marner to the Vegas Golden Knights Monday, ending the 100-point player's stint with the team and leaving a massive hole at a key position on the offensive side of the puck.