The surging San Francisco Giants open a three-game series Monday at Coors Field, where they have fared poorly. Bumgarner (1-2, 2.51) and Rockies left-hander Kyle Freeland (7-6, 3.29), who has been the Rockies' best starter, opposed each other Wednesday at AT&T Park. Both starters pitched seven scoreless innings before the Giants won 1-0 on Brandon Crawford's walk-off homer.