Matt Chapman's RBI single in the 12th inning lifted the San Francisco Giants to their third straight victory, 7-6 over the Washington Nationals on Saturday. The Nationals had the bases loaded with nobody out in the 10th, but didn't score. After each team was also blanked in the 11th, Chapman led off the 12th with a single off Cionel Pérez (1-2) to break the 6-all tie.