2008 MLB Opening Day (19 images)

Chicago Cubs fans Kristine Senger (L) and Jessie Engstrom hold up Harry Caray masks in front of the Wrigley Field marquee before the start of the opening day game against the Milwaukee Brewers in Chicago on March 31, 2008. (UPI Photo/Brian Kersey)

A light rain forces the Busch Stadium groundscrew to apply the tarp to the field before Opening Day ceremonies for the Colorado Rockies and the St. Louis Cardinals game at Busch Stadium in St. Louis on March 31, 2008. The game was eventually rained out after 3 1/2 innings. (UPI Photo/Bill Greenblatt)

Washington Nationals Ryan Zimmerman leaps into the arms of his teammates at home plate after Zimmerman hit a two-out bottom of the ninth home run to win the game 3-2 against the Atlanta Braves at the home opener of the new $611 million Nationals Park on March 30, 2008 in Washington. (UPI Photo/Pat Benic)

United States President George W. Bush delivers the ceremonial first pitch at the new Washington Nationals $600 million ballpark prior to the opening game between the Washington Nationals and the Atlanta Braves on March 30, 2008 in Washington. (UPI Photo/Pat Benic)