CINCINNATI (AP) - Not just any comeback would get San Francisco back to playing for a pennant. It would take one of Giant proportions.
And Buster Posey believed it could happen. Even after the Giants left the West Coast down two games, the National League batting champion insisted his team could pull it off, despite the long odds.
With one swing, he got everyone else believing it, too.
Posey hit the third grand slam in Giants' postseason history on Thursday, and San Francisco pulled off an unprecedented revival, moving into the championship series with a 6-4 victory over the Cincinnati …