Updated: September 17, 2012 at 12:00 am
SAN FRANCISCO — Brandon Crawford tripled, doubled and scored on a passed ball, and Hunter Pence singled home the go-ahead run in the sixth inning to lead the San Francisco Giants past the Rockies 2-1 on Monday night.
Madison Bumgarner (15-10) allowed one run and four hits in six innings while walking a career-high five. The lefty struck out six and relied on a strong defensive effort to extend San Francisco's lead to eight games over the idle Dodgers in the NL West.
Pence's RBI single off reliever Guillermo Moscoso (3-2) handed Colorado its 10th loss in 12 games.
Rockies starter Jhoulys Chacin gave up five hits and a run in five innings. He also doubled and scored on Josh Rutledge's triple in the fifth.
Four relievers held Colorado scoreless before Sergio Romo struck out pinch-hitter Jason Giambi for his 12th save in 13 chances.