Tyler Beede made a second consecutive scoreless start, and Buster Posey drove in the game's only run with a sixth-inning single Friday night as the host San Francisco Giants opened a three-game series against the Miami Marlins with a 1-0 victory. Beede (5-9), Tyler Rogers and Shaun Anderson combined on a four-hitter, helping the Giants (71-77) win for just the second time in five tries on their seven-game homestand. Sandy Alcantara (5-13) was the hard-luck loser for the Marlins (51-96).