A major reason for Toronto's success was their outstanding play shorthanded. James Van Riemsdyk and Paul Ranger each scored shorthanded markers late in the first period and third period respectively. Meanwhile, Calgary native Mason Raymond scored the game winning goal for the Maple Leafs at 5:59 of the third period.
It was also a brilliant performance by Maple Leafs goaltender Jonathan Bernier, who made 41 saves on 43 shot opportunities.
Wednesday evening was also a very physical affair as Toronto's Frazer McLaren fought Calgary's Brian McGrattan in the first period and Toronto's Carter Ashton fought Calgary's Shane O'Brien. Ashton has a Calgary connection because his father Brent played for the Flames in the 1992-93 season.
The Flames got goals from Matt Stajan and David Jones, but it was not enough.
The Maple Leafs improve to 10-4 and lead the Eastern Conference, two points up on the Pittsburgh Penguins, while the Flames drop to 5-5-2 and are six points back of the Los Angeles Kings for a playoff spot. Calgary next plays the Detroit Red Wings on Friday night.