Starlin Castro clubbed a solo home run in the top of the eighth inning to account for the game's lone run as the Cubs clipped the Pirates, 1-0. Matt Garza struck out seven through seven innings of four-hit ball to improve to 5-and-8 on the season. Carlos Marmol worked a flawless ninth to notch his 22nd save for the Northsiders, who have won four straight on the heels of a five-game slide. Charlie Morton worked seven scoreless innings for Pittsburgh in a no-decision. Chris Resop was saddled with the loss. Rodrigo Lopez will toe the rubber opposite James McDonald in tonight's series finale.