SAN FRANCISCO (AP) — Barry Zito is playing his part in this World Series, all right.After years of being labeled baseball’s most overpaid pitcher, Zito took the ball Wednesday night and thoroughly outshined reigning AL MVP and Cy Young Award winner Justin Verlander to lead the San Francisco Giants to an 8-3 victory over the Detroit Tigers that sent the orange-crazed home fans into a Zito-fueled frenzy.“You can’t let your nerves get to you. You can’t go out and try to make things happen,” Zito said. “You can’t go try to strike guys out or get ground balls. You just …