The San Francisco Giants ended their previous series against one of the NL's best teams without surrendering a run. Ryan Vogelsong will be tasked with maintaining the Giants' winning and shutout streaks Friday night in the opener of a four-game series with the Colorado Rockies at Coors Field. The Giants (23-18) are riding high after extending their win streak to six by sweeping the first-place Los Angeles Dodgers to become the first team since Milwaukee in July 2013 to not allow a run over a three-game series.