Trevor Brown hit a pair of two-run homers, Jeff Samardzija tossed eight solid innings to get his first win for San Francisco and the Giants beat the Colorado Rockies 7-2 on Tuesday night. Hunter Pence also hit a two-run home run to help San Francisco win for the fourth time in the last five games. Brown, starting at catcher in place of banged-up Buster Posey, hit a two-run homer off starter Tyler Chatwood (1-1) in the sixth and another off reliever Jason Gurka in the eighth.