SAN FRANCISCO — This winning streak is curing a lot of ills, and you can add this to the list: For the first time this season, the Giants got a win out of their No. 1 starter spot.Madison Bumgarner didn't pitch in a win before going down on his dirt bike and Ty Blach suffered the same fate through four starts. He helped turn that around Tuesday with a strong performance that was backed by a couple of Brandon Belt runs. The Giants won 2-1, extending their winning streak to five games. They have clinched a second straight series victory over the Dodgers. Alameda County Sheriff's Deputy Rear-Ended by Bus, Killed Blach got out of a couple of early jams and he was temporarily rewarded for it. Blach worked around two walks in the first and two hits in the fourth, and in the bottom of that inning he got a lead when Belt hit his eighth homer. The advantage wouldn't last long. Chris Taylor led off the sixth by driving a 2-0 fastball into the net beyond center field.The Giants manufactured a go-ahead run in the sixth, and Belt was again in the middle of it. He got a shift-busting infield single and went to second on a wild pitch. Buster Posey's grounder to the right side advanced...