Giants' starter Brad Hennessey gave up home runs to two out of the first three Astros' hitters, but settled down thereafter, striking out seven and improving his record to 2-0. ``His composure is definitely something to be complimented,'' said Mike Matheny. ``It shows he's a gutsy pitcher. He has shown that a couple of times this year. ``He doesn't let situations bother him. A young guy usually starts second-guessing himself in those spots, but he doesn't.'' Hennessey was recalled from Triple-A Fresno earlier in the day to make his second start of the year and ninth of his major league career. ``You can't let (the home runs) bother you,'' Hennessey said. ``Otherwise, you'll self-destruct. After those two pitches, I concentrated more and trusted my sinker. ``It's great that my teammates and manager had confidence in me tonight. It helps me build confidence in myself.'' The Giants scored two runs in the sixth and the ninth and one in both the first and second. Jason Ellison scored two runs for San Francisco.