Ryan Vogelsong should probably look at his last start at Coors Field rather than his first five if he is looking for comfort entering his latest trip to Denver. San Francisco's right-hander hasn't enjoyed much success at the hitter's paradise, but the Giants need him to snap their own skid in Thursday night's series opener against the Colorado Rockies. San Francisco (69-64) has squandered opportunity to make up ground in the NL wild card, dropping five straight to remain 6 1/2 games back of a Chicago team that's lost six of eight.