Yusmeiro Petit bounced off the mound pumping his fists and shouting ''Let's go!'' The right-hander from Venezuela certainly has found his swagger this October as a lights-out long man who delivers in the clutch game after game, inning after inning. He did it again Saturday night for the San Francisco Giants, pitching three scoreless innings of relief against the Kansas City Royals in an 11-4 victory that tied the World Series at two games apiece. Petit came oh-so-close to tossing a perfect game in 2013 - now he's a perfect 3-0 this postseason. He entered in the fourth inning of Game 4 with the Giants trailing 4-2 and held Kansas City in check while his teammates rallied.