SAN FRANCISCO >> The spirit of the Giants-Dodgers rivalry did not elude Jake Peavy on Sunday. The veteran right-hander, shipped to the Giants the day before in a trade with the Red Sox, pitched with enough adrenaline to fuel a chartered flight from Boston to San Francisco. When catcher Buster Posey skipped a low throw to the mound like a flat stone on a lake, Peavy dove to his right to smother the ball and keep a runner at first base.