Giants squander late lead, drop opener to Rox

For six innings Monday night, the Giants played a game suitable for framing, building a slender yet seemingly safe lead on the familiar foundation of pitching and defense. Then the Giants' evening liquefied in a single, solitary inning, as the Rockies bunched together three runs, none of which crossed home plate as the result of a base hit. San Francisco fell, 5-2, ending its three-game winning streak.