CHICAGO — Gregory Polanco homered twice to help back a third straight solid start by Trevor Williams, and the Pittsburgh Pirates pulled away from the Chicago Cubs 6-1 on Thursday.
Francisco Cervelli lined a three-run shot in the seventh off Cubs reliever Justin Wilson as Pittsburgh scored four times in the inning to break open a tight game. Adam Frazier also went deep for Pittsburgh, which improved to 9-3.
Kyle Schwarber homered, doubled and singled for three of the Cubs' seven hits. Chicago's Ian Happ had his first two-hit game this season.
Williams (3-0) was a touch better than Chicago starter Kyle Hendricks (0-1) in what began as a pitchers' duel following Chicago's 13-5 rout of Pittsburgh on Wednesday night.