Pence, Sandoval help Giants beat Rockies 5-3

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DENVER (AP) -- Hunter Pence and Pablo Sandoval hit back-to-back homers and Yusmeiro Petit won his first game in four years, helping the San Francisco Giants beat the Colorado Rockies 5-3 on Tuesday night.

Pence and Sandoval went deep in the opening inning, marking the first time all season the Giants have hit back-to-back homers.

Brandon Belt kept up his torrid hitting with four singles. He also scored twice to help San Francisco win for the third time in four games.

Petit (1-0) was recently called up from Triple-A Fresno to fill in for Matt Cain, who was placed on the 15-day disabled list last week with a bruised right forearm.

Petit lasted six innings, allowed six hits and two runs. He also struck out six.

Sergio Romo pitched a perfect ninth to pick up his 32nd save in 36 chances.