DALLAS — Kevin Shattenkirk scored a power-play goal 4:49 into overtime, giving the St. Louis Blues a 3-2 victory over the Dallas Stars on Sunday.Jaden Schwartz had a goal in his fifth straight game and T.J. Oshie also scored for the Blues, who improved to 12-0-1 against Central Division opponents. Brian Elliott made 28 saves to win for the second consecutive night.Dallas overcame a 2-0 deficit with second-period goals by Jamie Benn and Ryan Garbutt. Schwartz opened the scoring on a power play at 2:41 of the first. He has one goal in each of his last five games. St. Louis scored off a Stars mistake at 5:12 of the second. Oshie picked up the puck after Kevin Connauton whiffed on a pass in his own end. Dallas scored only its third power-play goal at home this season when Benn got his fourth goal in five games at 8:13. Dallas is 3 for 63 (5 percent) with a man advantage at home this season. Garbutt tied it 2-all at 11:31 on a screened shot from the left point that went between Elliott’s legs.After the Stars failed to score with a man advantage earlier in overtime, Connauton was penalized for tripping at 4:24. Shattenkirk took a pass from Alex Pietrangelo in the left circle and shot the puck past Lehtonen into the lower right side of the net. The Blues have earned at least a point in six consecutive road games (4-0-2), extending their season-best streak. It appeared that Dallas had scored in the first minute for the second consecutive game when Cody Eakin batted in a rebound of Garbutt’s shot. But the goal was disallowed because Garbutt didn’t allow Elliott to make a play on the puck. After a disputed icing call, Garbutt received a penalty for unsportsmanlike conduct. While he was in the box, Schwartz took a cross-ice pass from Vladimir Sobotka and put the puck into the open right side of the net. Schwartz has 13 goals this season. His five-game streak has him halfway to the Blues record of 10 set by Brett Hull – twice. Lehtonen stopped St. Louis’ second-best scoring chance in the period with a pad save of Vladimir Tarasenko’s wrist shot. Neither team had a goal or a penalty in a defense-minded third period, when Dallas outshot the Blues 8-4.