Josh Harrison hit the eventual game-winning two-run homer in the seventh as the Pirates topped the Cubs 5-3 from Wrigley Field. Jordy Mercer also went deep for Pittsburgh, which has won two of three. Pirates rookie Gregory Polanco scored twice and singled to extend his hitting streak to 11 games to start his career. Vance Worley allowed three runs in six-and-two-thirds innings for the win. Mark Melancon earned his 11th save. Travis Wood gave up three runs in four-and-two-thirds frames for the loss. Anthony Rizzo hit a two-run shot for Chicago, which had won two straight.