DENVER (AP) — Hector Sanchez hit two of San Francisco’s six homers, including a grand slam in the 11th inning Wednesday that gave the Giants a wild 12-10 victory over the Colorado Rockies.

With the Giants on the verge of being swept in a three-game series at Coors Field for the first time in 12 years, Sanchez drove a fastball from Chad Bettis (0-1) into the bushes behind center field. The backup catcher also hit a solo homer in the eighth.

Michael Morse also hit two homers: a solo shot in the second and a three-run homer the following inning. Brandon Hicks and Brandon Belt also went deep as the Giants rallied from a 5-1, second-inning deficit.

Jean Machi (4-0) earned the win with a perfect 10th. Sergio Romo struggled in a non-save situation, surrendering a two-run homer to Justin Morneau but retiring Brandon Barnes on a game-ending 5-4-3 double play.