Buster Posey homered, doubled twice and drove in four runs, rallying the San Francisco Giants past the Colorado Rockies 12-7 on Tuesday night.San Francisco Giants starting pitcher Yusmeiro Petit throws to the plate against the against the Colorado Rockies during the first inning of a baseball game Tuesday, Sept. 2, 2014, in Denver.Colorado Rockies' Corey Dickerson watches the flight of the ball as he hits a two run double off San Francisco Giants starting pitcher Yusmeiro Petit during the first inning of a baseball game Tuesday, Sept. 2, 2014, in Denver.San Francisco Giants' Joe Panik (12) is forced out at second as Colorado Rockies shortstop Josh Rutledge throws to first to complete the double play on Pablo Sandoval during the first inning of a baseball game Tuesday, Sept. 2, 2014, in Denver.San Francisco Giants' Buster Posey high fives teammate Guillermo Quiroz after hitting a solo home run off Colorado Rockies starting pitcher Jordan Lyles during the sixth inning of a baseball game Tuesday, Sept. 2, 2014, in Denver.