Pinch-hitter Darin Ruf homered with one out in the seventh inning and the San Francisco Giants beat Seattle 6-5 on Tuesday night, ending the Mariners' six-game winning streak. Alex Dickerson and Mauricio Dubon also went deep for the Giants, who erased a 5-1 deficit to win for the seventh time in nine games. First-year San Francisco manager Gabe Kapler had to use five pitchers to keep his club on a roll and got another big night from the offense.