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The Arizona Diamondbacks have taken over first place in the National League West, but whether they have the talent to stay ahead of the San Francisco Giants remains to be seen. If Arizona's starting rotation continues to excel, though, it could beat San Francisco at its own game. The Diamondbacks will try for their sixth victory in seven games when they visit the Colorado Rockies on Tuesday. Arizona defeated Colorado 5-1 on Monday as Patrick Corbin improved to 7-0 following a three-hitter.