PITTSBURGH (CBS/AP) -- A throwing error by pitcher Jared Hughes on a sacrifice bunt by reliever Jean Machi in the 13^th inning allowed the San Francisco Giants to score the winning run and overcome a six-run deficit to beat the Pittsburgh Pirates 11-10 Monday night.

Hughes (1-1) came on to start the 13^th. With one out, he walked Hunter Pence and hit Juan Perez with a pitch. Machi (5-0), in just the second plate appearance of his four-year career, then dropped down a bunt, which Hughes fielded and threw wildly past first base as Pence scored from second base.

Backup catcher Hector Sanchez had four hits and three RBIs in the Giants 20-hit attack, while Buster Posey, who got a day off from catching, had three hits, three runs scored and two RBIs.

Machi pitched two scoreless innings and Sergio Romo worked the 13^th for his 10^th save.

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