On a day when they made a trade to strengthen the back of their bullpen, the Oakland Athletics overcame their All-Star closer's fourth blown save and kept their late-inning magic going. Jonathan Lucroy singled home Matt Chapman in the 11th inning to give the A's a 4-3 victory over the San Francisco Giants on Saturday night. Hours after acquiring reliever Jeurys Familia from the New York Mets, the A's improved to a major league-best 22-7 since June 16 with their third win in five games against their Northern California rivals.