San Francisco Giants fans celebrate home opener at AT&T Park

SAN FRANCISCO (KGO) -- Fans are happy Monday after a 4-1 win over the Arizona Diamondbacks at the Giants' home opener in San Francisco.

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You don't need us to tell you what most San Franciscans know deep in their DNA, the home opener is an unofficial holiday.

Watch the video in the player above to see how Giants fans celebrated the Orange and Black's home opener at AT&T Park.

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