Watch: Marner dives to bang in rebound, opens Game 1 scoring

The underdogs have drawn first blood.

Mitch Marner banged home the opening goal of the Toronto Maple Leafs' first-round series against the heavily favored Washington Capitals less than two minutes into Game 1 on Thursday night.

It was the 19-year-old's first career playoff goal, and it came after a great second effort by James van Riemsdyk, who followed his own shot with another and got the puck to carom out to Marner, who found himself with a virtually wide-open cage out front.

Marner also made a little history in the process, becoming the first Leafs teenager to score a postseason marker since Daniel Marois in 1988, according to ESPN Stats & Info, and the first Toronto rookie to do so since Jeff Farkas in 2000.

The Presidents' Trophy winners have home-ice advantage throughout the playoffs, but that won't matter if the underestimated visitors can continue to silence the Verizon Center crowd.