The Oakland Athletics strung together four consecutive singles in a four-run fourth inning Sunday afternoon that allowed them to hand the San Francisco Giants their first home series loss since April with a 6-2 win in the battle of interleague rivals in San Francisco. Sean Manaea (9-6) outdueled Andrew Suarez (3-6) in a matchup of left-handers, helping the A's complete a 4-3, 6-2 weekend sweep after the Giants had prevailed 7-1 Friday night in the series opener. The teams will meet in a three-game rematch immediately following the All-Star break in Oakland.