Bastardo (0-1), however, faced only four batters before giving up the winning run. Belt reached on a one-out single and made it to second when Angel Pagan was safe on a fielding error by first baseman Ty Wigginton.
Cabrera then hit a 1-0 pitch to right to bring home the winning run.
Clay Hensley (1-0) picked up the victory when he retired John Mayberry on a ground ball with a runner on third in the top of the 11th.
San Francisco downed Philadelphia for the second straight night. Cain gave up two hits through nine innings and Lee allowed seven hits with seven strikeouts through 10 frames.
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