The Maple Leafs will try to regain the momentum from a recent four-game winning streak Saturday night when they face the Flames.
Phaneuf was the centerpiece of a blockbuster seven-player trade on Jan. 31 that saw the Maple Leafs land one of the league's top defensemen. Stajan and Hagman are the only two players the Flames received still with the team.
Phaneuf went back to Calgary as a member of the Maple Leafs for the first time Dec. 16, and was held without a point in a 5-2 loss.
Hagman had a goal and an assist for the Flames.
"Obviously, I wanted to win, too. I wanted to play well against my old team and show them that I can still play," said Hagman, who scored 42 goals in 120 games with Toronto.
Stajan spent 5 1/2 seasons with the Leafs, finishing 2009-10 with a career-high 57 points.
"It's obviously nice beating the blue and white where I was for so long," Stajan said.
Phaneuf, who missed more than a month earlier this season with a leg laceration, has one goal and three assists in 16 games since returning.
Toronto (18-21-4) had its season high-tying four-game winning streak snapped with a 5-1 loss at Phoenix on Thursday as rookie James Reimer allowed four goals on 20 shots in his worst game. He was returned to the AHL on Friday.
The Maple Leafs were held to one meaningless late third-period goal after averaging 5.5 during their four-game run. Toronto has allowed the opposition to score first in four straight games.
Phil Kessel and Mikhail Grabovski were both cooled off by the Coyotes. Kessel had his four-game goal streak stopped, while Grabovski's five-game point streak was halted.
Saturday could see the return of Jean-Sebastien Giguere, sidelined since injuring his groin in the loss at Calgary. Giguere is 6-2-0 with a 2.32 goals-against average in his last eight starts against the Flames.
Calgary (19-20-5) rebounded from two straight shootout losses and ended a four-game skid with a 3-2 victory at Ottawa on Friday. David Moss scored twice and rookie Henrik Karlsson stopped 33 shots in his second start this month.
The Flames have claimed 12 of a possible 18 points in their last nine games.
"We've just got to stay with it," said coach Brent Sutter, who recently said he wanted his team to get four of every six available points.
"That's one of the goals we have is just making sure that we do that, and take care of our short-term goals and not look at where we're sitting in the standings or what's going on anywhere around us, let's just make sure that we take care of our own business."
Sutter has to decide whether to stick with Karlsson or go back to struggling Miikka Kiprusoff, who has given up 11 goals on 56 shots in his last three games. Kiprusoff, though, has surrendered five goals in winning his last three starts against the Maple Leafs.
Flames captain Jarome Iginla has five goals and eight assists during a six-game points streak versus Toronto.
Last month's win was the Flames' third straight against the Maple Leafs. Calgary ended a four-game losing streak at Air Canada Centre with a 5-2 victory Nov. 14, 2009.
AccuScore has powered more than 10,000 simulations for every NHL game on ESPN.com, calculating how each team's performance changes in response to game conditions and opponent's abilities. Each game is simulated and the game is replayed a minimum of 10,000 times to generate forecasted winning percentages.