Charlie Blackmon hit a three-run, two-out homer off Camilo Doval to cap a comeback from a four-run deficit in the final inning, giving the Colorado Rockies an 8-6 win over the San Francisco Giants on Tuesday night for a doubleheader split. Brandon Belt hit a go-ahead single and a grand slam in a 10-run first inning that propelled the Giants to a 12-4 victory in the opener, then homered again as the Giants built a 6-2, sixth-inning lead in the second game. Blackmon hit his second homer of the season, driving a full-count slider into the right-field seats for his fourth game-ending home run.