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SAN FRANCISCO - OCTOBER 27: A fan of the San Francisco Giants and her dog poses outside of AT&T Park prior to Game One of the 2010 MLB World Series on October 27, 2010 in San Francisco, California. (Photo by Christian Petersen/Getty Images)

A fan of the San Francisco Giants and her dog poses outside of AT&T Park prior to Game One of the 2010 MLB World Series on October 27, 2010 in San Francisco, California.

MLB's cutest fans

Dogs at the stadium! Baseball's cutest fans happen to walk on four legs. These furry fans will steal your heart.