Gregory Polanco hit his team-leading 19th home run, Francisco Cervelli added his 10th of the season and the Pittsburgh Pirates finished off a frantic trade deadline day with a 5-4 victory over the Chicago Cubs on Tuesday night. Hours after trading for Texas closer Keone Kela and Tampa Bay starting pitcher Chris Archer to give their postseason hopes a jolt, the Pirates won for the 16th time in 20 games by getting to Jon Lester (12-4) in the middle innings and holding on late. Polanco’s solo homer in the eighth gave Pittsburgh a two-run cushion. The Pirates needed it after closer Felipe Vazquez gave up a single to pinch-hitter David Bote leading off the top of the ninth and Addison Russell followed with a shot to the gap in right-center that scored Bote. Jon Lester hadn’t lost on the road since falling to Cleveland on April 25.
