A's hold down Giants in Bay Bridge Series opener

Josh Harrison stroked a two-run single and Starling Marte used his bat and his legs to produce two key runs as the Oakland Athletics defeated the visiting San Francisco Giants 4-1 on Friday in the opener of a three-game series.

Right-hander James Kaprielian (7-4) combined with four relievers on a five-hitter, helping Oakland, the second-place club in the American League West, open a nine-game homestand with its second wi