It happened again. For the second day in a row, a low-scoring duel between Houston and San Francisco persisted into the late innings. The Giants, again, broke through for a single run against an elite Astros starter. And once more, when Madison Bumgarner handed the reins to the bullpen after seven scoreless innings, the relief corps yielded a back-breaking go-ahead homer, this time to Tyler White. The Giants fell, 2-1, and were swept in a two-game series by the defending World Series champions on Tuesday afternoon at AT&T Park.