Austin Jackson hit a go-ahead three-run double in the fifth inning Saturday and Johnny Cueto gave up two runs over six innings as the San Francisco Giants earned a doubleheader split with an 8-3 victory over the visiting Los Angeles Dodgers. The Dodgers took the doubleheader opener earlier in the day, 15-6. Jackson entered Saturday's nightcap with a .198 batting average over his first 18 games with the Giants and just three RBIs, but he doubled that total on his extra-base hit to left field off Dodgers starter Alex Wood (0-3).