Brandon Crawford hit a grand slam, Chadwick Tromp and Darin Ruf added two-run homers, and the San Francisco Giants prevented the Oakland Athletics from clinching the AL West title at home with a 14-2 victory Sunday. The Giants earned their first win in six tries during this year's Bay Bridge Series and go into the season's final week chasing a playoff spot. ''Look, we seem to be a team that responds pretty well,'' A's manager Bob Melvin said.