The Blues haven't been beating their opponents lately, but Thursday night they at least managed to end a bad trend.

Entering Thursday night without a goal in their last two games, the Blues went into the third period against the Calgary Flames without lighting the lamp.

Then finally, Blues rookie Lars Eller, who was making his NHL debut, ended two long droughts when he scored a power-play goal midway through the third period.

Eller's goal ended the Blues' scoreless spell at 168 minutes, 7 seconds and also snapped an 0 for 26 power-play drought. But while the tension lifted for a brief moment, the Blues learned that the hard times were hardly over.

In overtime, Calgary's Dion Phaneuf ripped a slap shot from the blueline, grazing off the shin pad of Blues forward T.J. Oshie and redirecting past goaltender Chris Mason for a 2-1 victory over the Blues.

And just like that, the Blues matched their longest losing streak of the season at three games. The club is now 1-5-1 at Scottrade Center this season

"We must be serving some sort of penance for something, and we're going to be justly rewarded down the road if we keep working hard," Blues coach Andy Murray said.

With Phaneuf's goal coming in OT, the Blues earned a point for the first time in three games. But they were lamenting this loss because the Flames' first goal came on a backbreaking mistake by defenseman Eric Brewer.

On a breakaway, Calgary's Jarome Iginla ripped a shot at Mason, who got a large chunk of the puck. The puck, though, trickled past him and was headed for the goal line.

As Mason made a sweeping move with his glove to knock the puck away — which he did before it went completely across the line — Brewer whacked at the puck, directing it in for a goal.

"I got it out and it just went back in," Mason said. "That's just the way the breaks are going right now."

Brewer was unavailable for comment after the game.

The Blues were looking for something good — anything good — to happen to them, but suddenly they spotted the visitors a 1-0 lead on a goal that was credited to Iginla.

The only bright spot in the development was that there were still 56 minutes, 26 seconds left in the game. But for anyone following the Blues recently, that's not a lot of time.

The Blues had gone 120:52 without a goal, dating to David Perron's shorthanded goal in a 5-2 win over Carolina Oct. 28.

The club felt that if it could score on the power play, it could build some confidence, which could help its 5-on-5 offense. But through two periods Thursday, the Blues were 0 for three with the man advantage, including a two-man advantage in the second period that lasted 1:37.

Murray called a timeout to set up the team's plan of attack on the 5-on-3.

"We executed the plays we wanted to do, which was pretty much me teeing off for a while," defenseman Erik Johnson said. "We can look for some other plays, but that's what we wanted to establish first."

The Blues mustered four shots before the two-man advantage expired, but Calgary goalie Miikka Kiprusoff kept them scoreless.

The Blues were outshooting the Flames 22-15 after two periods, but getting more chances than their opponent hasn't helped the team in its last two games. The club outshot Phoenix 32-29 and did the same to Florida 34-27, but came away with goose eggs.

On Thursday night, when the shots ended 31 apiece, the Blues looked like they would come away with egg on their face again, as the game went into the third period with the Flames still leading 1-0.

On the Blues' fifth power play of the game, Johnson rifled a shot from the point, which dusted off Eller's jersey and went past Kiprusoff. Eller became the 12th player in Blues' history to score in his NHL debut, tying the score at 1-1.

"It was a really good feeling," Eller said.

But then in OT, Phaneuf rifled in his sixth goal of the season. Oshie just tried to get in the way.

"It was going a little bit wide of me, so I tried to stick my leg out and get it blocked, get it down," Oshie said. "It just nicked the outside of my leg."