The Pirates' bullpen put together four hitless innings, but the Astros withstood Gregory Polanco's RBI triple in the seventh and got the ball to Ken Giles, who pitched a perfect ninth to secure his fifth save. Like Houston, Pittsburgh is trying to gain ground in the Wild Card standings -- but the Bucs have dropped five of their last six, falling three games behind the Cardinals in the National League race.
MOMENTS THAT MATTERED
Gatty-bomb: Astros slugger Gattis reached 20 homers for the second year in a row with his two-run shot to center field in the second inning.