(Adds details) DETROIT, Oct 28 - Big-hitting San Francisco Giants third baseman Pablo Sandoval was named the Most Valuable Player (MVP) for Major League Baseball's World Series on Sunday. The Venezuelan batted .500 with four runs batted in, including a three-homer game in the series opener, as the Giants swept the best-of-seven series 4-0 to capture their second title in the past three seasons. Sandoval's Game One heroics set the tone for the Giants' stunning and perhaps unexpected victory. ...