Houston right-hander Roy Oswalt yielded just three hits and a run in eight innings and hit a two-run single Sunday in a 7-1 Astros victory over San Francisco.

Oswalt (5-4) has given up only three runs in his last three starts.

Manuel Tejada, Hunter Pence and Jason Michaels clubbed solo homers and Jeff Keppinger doubled in a run and scored twice for the Astros.

Rich Aurilia homered for the Giants.

Randy Johnson (8-6) took the loss. The big left-hander allowed four runs and five hits before leaving the game in the fourth inning with what appeared to be a left shoulder strain.