Newcomers Alex Dickerson and Mike Yastrzemski are making their presence felt during the San Francisco Giants' surprising mid-season surge. Dickerson had a career-high four hits, including the go-ahead RBI single in San Francisco's four-run 10th inning as the Giants recovered from giving up a three-run lead in the ninth to beat the Colorado Rockies 8-4 on Tuesday night. Yastrzemski homered and doubled among his three hits and had three RBIs to help the Giants win their fourth straight and seventh in the last eight.