Vance Worley tossed a four-hitter for his first career shutout, and the Pittsburgh Pirates pounded Madison Bumgarner early in a 5-0 win over the struggling San Francisco Giants on Monday night.Pittsburgh Pirates' Gregory Polanco (25) swings for an RBI sacrifice fly off San Francisco Giants' Madison Bumgarner in the first inning of a baseball game Monday, July 28, 2014, in San Francisco.Pittsburgh Pirates' Vance Worley works against the San Francisco Giants in the first inning of a baseball game Monday, July 28, 2014, in San Francisco.Pittsburgh Pirates' Vance Worley works against the San Francisco Giants in the first inning of a baseball game Monday, July 28, 2014, in San Francisco.Pittsburgh Pirates' Neil Walker, center, scores past San Francisco Giants catcher Buster Posey, right, in the first inning of a baseball game Monday, July 28, 2014, in San Francisco. Walker scored on a sacrifice fly by Pittsburgh's Gregory Polanco. At left is home plate umpire Jim Reynolds.