Chris Kunitz also scored for the Penguins, who gained a small measure of revenge on the Bruins after Boston swept them out of the playoffs last spring.
The meeting between the teams was the first since Boston's four-game sweep in the Eastern Conference finals, when the Bruins suffocated the NHL's highest scoring team into submission. The Penguins scored only twice in nearly 14 periods of hockey, undone by Boston's defence and a near flawless performance by Rask, who stopped 134 of 136 shots in the series.
MAPLE LEAFS 4, FLAMES 2
Eastern Conference-leading Toronto has won three straight to improve to 10-4-0. It was the Maple Leafs' first victory in Calgary since Dec. 27, 2002.
Joffrey Lupul, Mason Raymond and Paul Ranger — short-handed into an empty net — also scored for Toronto. Coming off a 4-0 victory on Tuesday night in Edmonton, the Maple Leafs will wrap up their three-game trip through Western Canada on Saturday night in Vancouver.