Chad Qualls hadn't pitched in over a week. His first appearance since April 11 turned out to be a blown save.
Strong starting pitching, stellar defense, and some opportune hitting added up to an Astros 3-1 lead. Then, the ninth inning happened.
Jason Castro gets Saturday off to rest up when the Astros play the second game in their series against the Athletics.
Astros prospect Delino DeShields Jr. had to leave Friday's game between Corpus Christi and Frisco after getting hit in the face with a pitch.