Alex Pietrangelo scored with 52.2 seconds 2.

Vladimir Sobotka, positioned along the left boards, slid a pass to the front of the net with time winding down in overtime. Pietrangelo gathered the disc and went forehand to backhand before flipping the puck into the net.

Scott Nichol and Jamie Langenbrunner also lit the lamp for the Blues, who snapped a two-game skid.

Brian Elliot made 31 saves to improve to 8-1-0 on the year.

Steve Sullivan and James Neal scored for the Penguins, who have lost three of four. Sidney Crosby had two shots in his second game back.

Marc-Andre Fleury turned aside 40-of-43 shots.