Cody Ross had a two-run double and scored on a double steal in the fifth inning to help San Francisco build a five-run lead, then the Giants held on for a 6-5 win over the Arizona Diamondbacks on Tuesday night to stay atop the NL West. The Giants took advantage of an off-kilter Josh Collmenter (4-2) to lead 5-0 after five innings, but starter Matt Cain (6-4) nearly gave it all back over the next...