Tyler Anderson pitched efficiently into the seventh inning, Nolan Arenado kept up his torrid August with another RBI and the Rockies beat the Los Angeles Dodgers 7-0 in the opener of a doubleheader Wednesday. Anderson (5-5), with his deceiving motion, allowed six hits in 6 1-3 innings against the NL West leaders. Ross Stripling (3-6) surrendered three runs over six innings.