McCutchen homers and Pirates beat Cubs 4-2
Pittsburgh pounded Cubs starter Jason Hammel for 11 hits in five innings, snapping his streaks of 14 1-3 innings without allowing a run and 52 innings without allowing a homer when McCutchen hit his 10th in the first.
Brandon Cumpton pitched five effective innings for the Pirates, who have taken two of the first three games of the series with their NL Central rivals.
Luis Valbuena continued his hot hitting with three hits for last-place Chicago, which has lost three of four after a season-best five-game winning streak.
The game's first pitch was delayed one hour and 38 minutes because of a severe thunderstorm.
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