MIAMI The Giants do not need the seas to part.They don't need a flood of runs to win, either. But they do need to execute when they have a chance to score.And flying across the country to South Florida did nothing tochange their tired mojo from a horrible homestand. Pablo Sandoval hit a solo home run in the first inning and thenthe Giants shut down. Matt Cain gave upa pair of runs in the bottom of the first and blamed himself afterthe Giants lost 2-1 to the FloridaMarlins at Sun Life Stadium Friday night.