Houston took an early 1-0 lead with a single off the bat of Brett Wallace in the first. Pittsburgh quickly answered in the top of the second, as Gaby Sanchez launched a leadoff home run, his seventh of the season.
Pirates' starter Kevin Correia and Astros rookie left-hander Dallas Keuchel kept things knotted at 1-1 until the Astros broke things open in the seventh. A single and an error put two runners on for catcher Jason Castro, who hit his third home run of the season to give the Astros a 4-1 lead.
Keuchel allowed four hits and one run over seven innings and Hector Ambriz and Wilton Lopez combined to log two perfect innings of relief.
Stick with SB Nation Houston for scores, previews, updates and more from the Astros vs. Pirates series. For more insight and analysis, check out Astros blog The Crawfish Boxes, or for the Pittsburgh perspective, check out Pirates blog Bucs Dugout.