Play Ball! Baseball's Opening Day Finally Arrives

A giant American flag is unfurled on the field before an opening day baseball game between the Cincinnati Reds and the Philadelphia Phillies on April 4, 2016, in Cincinnati.

Josh Hamilton of the Texas Rangers, left, autographs a baseball for a young fan before an opening day baseball game against the Seattle Mariners on April 4 in Arlington, Texas.

San Francisco Giants pitcher Madison Bumgarner throws to a Milwaukee Brewers batter during the first inning on April 4 in Milwaukee.

The Philadelphia Phillies warm up during practice before an opening day baseball game against the Cincinnati Reds in Cincinnati.

Heather Stangaland and Shane Nelson enjoy the tradition of tailgating at Miller Park before an opening day game between the Milwaukee Brewers and the San Francisco Giants in Milwaukee.

Scooter Gennett of the Milwaukee Brewers, right, is tagged out by Buster Posey of the San Francisco Giants while trying to score during the fourth inning.

A young fan is dressed for the the opening day game between the Philadelphia Phillies and the Cincinnati Reds at the Great American Ball Park on April 4 in Cincinnati.

Baseball fans stand during the singing of the National Anthem before the opening day game between the Baltimore Orioles and the Minnesota Twins at Oriole Park at Camden Yards.

Rolando Sanz, bottom center, sings a rendition of the national anthem as an American flag is pulled into place before an opening day baseball game between the Baltimore Orioles and the Minnesota Twins.

Adam Jones of the Baltimore Orioles is introduced before the start of the opening day game.