Moved up in the batting order, Triston Casas homered and hit an RBI double to back Kutter Crawford, and the Boston Red Sox beat the San Francisco Giants 3-2 for their fifth straight win.Second baseman Justin Turner delivered the defensive gem of the night to save at least one run in the seventh. He backhanded a two-hopper by pinch-hitter Blake Sabol and flipped the ball to shortstop Yu Chang for the force out on Patrick Bailey. Josh Winckowski then struck out the last two batters.