Claude Giroux scored the winner on a second-period power play as the Ottawa Senators topped the Toronto Maple Leafs 4-2 to register their sixth straight victory Saturday night.

PITTSBURGH -- William Nylander scored 1:00 into overtime, and the Toronto Maple Leafs rallied twice to extend their winning streak to five games with a 6-5 victory against the Pittsburgh Penguins at PPG Paints Arena on Sunday.

Just 10 minutes in, the Maple Leafs were up 2-0 with a 13-3 shot advantage, dominating a tired Penguins team playing an early game on the second leg of a back-to-back. Less than five minutes later, Toronto was down 3-2, and the team ended the first period with a 17-13 shot deficit.