Andrew Cashner finally had something to show for another start: a victory. He pitched seven strong innings to win for the first time since mid-April, Jedd Gyorko hit a two-run homer, and the San Diego Padres snapped a six-game skid by beating the Los Angeles Dodgers 6-3 Tuesday night. ''I thought Cash really threw the ball well and clutched up and made pitches at big times when the Dodgers were threatening,'' Padres manager Bud Black said. I'm happy we got the early runs and he made them hold up.'' The Dodgers had their four-game winning streak end, and their NL West lead was cut to 2 1/2 games over San Francisco.