ST. LOUIS - Michael Cammalleri refused to take the credit for the Calgary Flames' come-from-behind victory over the St. Louis Blues. He chose to deflect it all to his teammates for a hard-earned road victory.

Cammalleri's overtime goal at 2:21 capped a dramatic comeback for the Flames, who twice rallied from two-goal deficits to defeat the Blues, 4-3. "I don't think I'm the game hero by any means," said Cammalleri, whose goal was his 10th of the season. "I just think I was the guy that scored the last goal."

The Flames overcame deficits of 2-0 in the first period and 3-1 in the third, before Cammalleri's wrist shot off a pass from Jarome Iginla from the top of the right circle beat Chris Mason for the winning goal.

"He just snapped it and I just stood up," Mason said, describing the shot from a tough angle. "I knew he was going to shoot high. I was still moving when he shot it and it just beat me right under the arm."

The Flames got third-period power play goals from Iginla and David Moss. Rene Bourque also scored for Calgary, which got four assists in the game from Dion Phaneuf and two from Curtis Glencross.

"It's definitely a positive and you want to be able to contribute," Phaneuf said. "It was a huge win for our team. We didn't get off to the start we wanted. We were down 3-1 and to come back, it's a huge win."

David Backes, Patrik Berglund and Brad Boyes scored for the Blues. Carlo Colaiavoco picked up two assists, and Berglund and Boyes also had assists.

The game was the second straight home game in which the Blues, who have lost four of five, failed to protect a 2-0 lead.

"I refuse to let them talk about the negatives because we know there are some things we can correct, but right now we need every single point we can get," Blues coach Andy Murray said. "We can sit and whine about being up 2-0 and letting it slide or taking unnecessary penalties. A penalty-killing group that has been very good for us up to this point this season hasn't gotten the job done the last few games."

The Blues took two penalties at the start of the third period with that 3-1 lead, but the Flames were able to cash in on each chance to tie the game.

Iginla scored his team-leading 13th goal of the season 1:43 into the third period, and Moss tied the game when he deflected a shot by Phaneuf from the left point at 5:19.

Calgary outshot the Blues 10-0 to begin the third period.

"We found a way to come back and our power play was a significant factor in tonight's victory," Flames coach Mike Keenan said.

The Blues, who outshot the Flames 9-2 in the first period, went ahead when Backes banged home his sixth goal of the season off a rebound of Barret Jackman's wrist shot after the Flames failed to clear the zone. Berglund collected his seventh of the season on a power play, one-timing Boyes' backhand feed from the right circle.

Bourque got the Flames within one when he scored at 7:12 of the second period, knocking in Phaneuf's rebound from the left circle.

The Blues, who have the fourth-best power play in the league, regained their two-goal edge when Boyes notched his team-leading 13th of the season, a power-play goal at 15:50 of the second period. Boyes one-timed a shot from the left circle into the empty side of the net on Berglund's cross-ice feed.

"They're not a bad team by any means and you know they're going to come out hard," Mason said, "but we did it to ourselves there."

Notes: The Flames won 10 of 11 previous meetings with the Blues prior to Friday. ... Blues rookie F T.J. Oshie returned to the lineup after missing 13 games with a high ankle sprain. ... Calgary C Dustin Boyd missed his fourth consecutive game with an upper body injury. ... Boyes now has 99 career goals and 99 points as a member of the Blues.