Pittsburgh went into the ninth inning trailing 5-3, but Derrek Lee's grand slam propelled the Pirates to a 7-5 victory over the Cubs. Ryan Doumit and Garrett Jones each added an RBI for the Bucs, who will look to sweep the three-game set Sunday. Chris Resop got the win, and Joel Hanrahan recorded his 34th save. Alfonso Soriano drove in four runs for the Cubs, who have lost three straight. Carlos Marmol took the loss after giving up Lee's homer.