Oakland starter Daniel Gossett allowed just one run over six innings while striking out seven and walking three.
The Astros had chances in the third and fourth innings with runners in scoring position. Max Stassi and George Springer walked to open the third inning and Travis White doubled in the fourth. But both times were squandered.
The Astros broke through in the fifth with a RBI double from Alex Bregman, Stassi scored on the play. Houston trailed 3-1 at the time.
While the Astros were shutout by the A's bullpen, the Astros bullpen gave up eight runs.
Tyler Clippard walked home a run in the sixth and was pulled with the bases loaded. Khris Davis singled off James Hoyt, scoring two more runs to put the A's up 6-1.
Reymin Guduan couldn't find the strike zone in the eighth inning, leading to a five-run inning for the A's. Overall, it was a disaster.
The Astros walked 13 batters. THIRTEEN WALKS. Charlie Morton had three, Clippard had three, Hoyt had one, Guduan had five and J.D. Davis had one.