PITTSBURGH - Pedro Alvarez and the Pirates kept that Jolly Roger flapping high above Pittsburgh.
Alvarez hit a tiebreaking single in the eighth inning and the Pirates beat the St. Louis Cardinals 5-3 on Sunday to take a 2-1 lead in best-of-five National League division series.
Alvarez pulled a grounder into right field that scored pinch-runner Josh Harrison from second base. Russell Martin followed with a sharp RBI single against reliever Kevin Siegrist, who took over after Carlos Martinez (0-1) faltered.
The go-ahead single was the latest big hit by Alvarez. He homered in the first two games of the series and is 4 for 10 with four RBIs.
Alvarez also kept the Pirates' famous flag flying high in October. "Raise the Jolly Roger!'' is the rallying cry for this wild-card team, now one victory from its first postseason series win since the 1979 World Series.
Mark Melancon (1-0) picked up the win despite allowing Carlos Beltran's tying home run in the top of the eighth. Jason Grilli worked the ninth for a save.
Charlie Morton is set to start for the Pirates in Game 4 on Monday against rookie Michael Wacha.
Beltran finished 2 for 3 with three RBIs. His 16th postseason home run moved him past Babe Ruth for eighth place in postseason history.
Beltran's shot temporarily silenced a rocking crowd at PNC Park. It also set the stage for another dramatic win by the Pirates.
Andrew McCutchen led off the eighth with his second hit, a double to left. But the NL MVP candidate unwisely tried to advance on Justin Morneau's grounder to shortstop and was an easy out at third.
Harrison ran for Morneau and moved up when Marlon Byrd walked. St. Louis manager Mike Matheny turned to the lefty Siegrist to face the left-handed Alvarez. The Pittsburgh slugger tied for the NL lead with 36 homers in the regular season, but hit just .180 against lefties.
Alvarez responded with his single between first and second. Martin then tried to drop down a squeeze bunt to score Byrd from third - he fouled it off, then lined a hit to left that gave Grilli more than enough cushion.
Martin's sacrifice fly off reliever Seth Maness in the sixth gave the Pirates a 3-2 lead and turned the game over to Pittsburgh's "Shark Tank'' bullpen.