SAN FRANCISCO (AP) — A Giant dose of small ball, and suddenly San Francisco finds itself in a most unique position — way ahead in a postseason series. Madison Bumgarner shut down the Detroit Tigers for seven innings, then the Giants took advantage of a bunt that stayed fair to eke out the go-ahead run in a 2-0 win Thursday night for a 2-0 edge in the World Series. Gregor Blanco's single trickled to a stop inches fair on the infield dirt, setting up Brandon Crawford's run-scoring double-play grounder in the seventh.