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Pat Sullivan, AP photo
Houston Astros' Bud Norris follows through on a pitch against the San Diego Padres in the first inning of a baseball game Thursday, April 14, 2011, in Houston.

HOUSTON — Bud Norris and the Houston bullpen combined on a three-hitter, Michael Bourn singled home the only run and the Houston Astros beat the San Diego Padres 1-0 Thursday night.

Norris (1-1) gave up two hits, struck out seven and left after pitching the top of the sixth. Bourn got his RBI hit in the bottom half of the inning against Dustin Moseley (0-3).

Relievers Fernando Abad, Mark Melancon and Brandon Lyon combined to close out the win. Lyon pitched a perfect ninth for his second save.

Moseley allowed seven hits in 6 2-3 innings and once again was the victim of the Padres' poor run support. San Diego's three shutouts this season have all come in his starts.