MLB: San Francisco 9, Arizona 6

May 2, 2013 at 1:17 AM

PHOENIX, May 2 (UPI) -- Brandon Belt's three-run homer in the eighth inning completed a San Francisco comeback Wednesday and the Giants went on to defeat Arizona 9-6.

The Diamondbacks had a 4-2 lead through four innings and managed to fight off San Francisco's persistent rally through seven.

Arizona owned a 6-4 lead heading into the eighth, but reliever David Hernandez (1-2) walked Hunter Pence and Gregor Blanco before giving up Belt's homer to right.

The Giants then added two runs in the ninth on an RBI double from Pablo Sandoval and Buster Posey's sacrifice fly. It was San Francisco's third straight victory.

The win went to George Kontos (2-1), the third of six San Francisco pitchers who worked 1 2/3 innings of scoreless relief. Sergio Romo came on in the ninth for his 11th save.

Cliff Pennington had four RBI for Arizona, three of them coming on a homer in the second.

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