Former US President George W. Bush (L) and Texas Rangers President Nolan Ryan (R) stand as Texas Rangers' Mitch Moreland warms up in the seventh inning during Game 3 of Major League Baseball's World Series against the San Francisco Giants in Arlington, Texas, Oct 30, 2010. [Photo/Agencies]

Former US President George H.W. Bush (R) watches as his son, former President George W. Bush, throws a ceremonial first pitch prior to the start of Game 4 of Major League Baseball's World Series between the San Francisco Giants and the Texas Rangers, in Arlington, Texas, Oct 31, 2010. [Photo/Agencies]