DETROIT, Oct 27 - The San Francisco Giants rode a virtuoso pitching performance to blank the Detroit Tigers 2-0 on Saturday and move with one victory of their second World Series title in three years. San Francisco, winners of the 2010 World Series in five games over the Texas Rangers, have a 3-0 lead and can claim the championship with a victory at Detroit's Comerica Park on Sunday. Giants starter Ryan Vogelsong allowed the Tigers just five singles over 5 2/3 innings before giving way to two-time Cy Young Award winner Tim Lincecum and closer Sergio Romo. ...