PITTSBURGH — The Pittsburgh Penguins made every effort to overcome mistakes and force overtime against the St. Louis Blues Wednesday night, but their errors were too much to overcome in the end.Alex Pietrangelo’s game-winning goal at 4:07 of the extra period wrapped up a 3-2 win for the Blues at CONSOL Energy Center.Scott Nichol opened the scoring for St. Louis at 5:33 of the first period on a wrist shot that was deflected past goaltender Marc-Andre Fleury after Nichol intercepted an errant pass by defenseman Paul Martin near the Penguins’ blue line.After thoroughly dominating the New York Islanders in captain Sidney Crosby’s return from a concussion two nights before, the Penguins struggled to build momentum in the offensive zone through the first 40 minutes of the game, being out-shot, 25-12.”We did not see anything from the Blues that we didn’t expect,” said head coach Dan Bylsma. “We didn’t have what they had. They had a lot of jump, they won a lot of battles. We didn’t have that.”Steve Sullivan finally broke the monotony with a power play goal on a one-timer assisted by Evgeni Malkin and Tyler Kennedy at 3:03 of the third period.The Blues answered when Jamie Langenbrunner swatted a rebound past Fleury for his second goal of the season and a 2-1 lead.The Penguins stepped up their aggressiveness in the attack zone in the third, out-shooting the Blues, 17-15. That aggressiveness finally paid off when James Neal fired a one-timer from the left face-off circle for his 13th goal of the season to tie the game at 2 with 5:51 remaining in regulation and eventually send it to overtime.A giveaway by Kris Letang allowed Matt D’Agostini and Vladimir Sobotka to set up Pietrangelo with an open back-handed shot in front of the net to clinch the victory with just 52 seconds remaining in overtime.NOTES: Neal has 13 goals on the season, trailing Toronto’s Phil Kessel (16) for the league lead. Eleven of his goals have come on home ice. … Crosby snapped a streak of 21 consecutive home games with at least one point. … Paul Martin had a -1 rating, dropping him to -10 so far this season. … The Penguins killed all five of their penalties, three of them charged to Crosby. … Malkin assisted on both Penguin goals.