Justin Morneau hit a two-run double in the eighth inning as the Colorado Rockies beat the San Francisco Giants 8-7 Sunday to complete a three-game sweep with another comeback victory.Colorado Rockies' DJ LeMahieu celebrates after scoring on Justin Morneau's two-run double off of San Francisco Giants pitcher Javier Lopez during the eighth inning of a baseball game in San Francisco, Sunday, June 15, 2014.Colorado Rockies' DJ LeMahieu (9) scores past San Francisco Giants catcher Hector Sanchez during the eighth inning of a baseball game in San Francisco, Sunday, June 15, 2014.San Francisco Giants' Madison Bumgarner (40) is congratulated by manager Bruce Bochy, right, after hitting a solo home run off of Colorado Rockies pitcher Franklin Morales during the fifth inning of a baseball game in San Francisco, Sunday, June 15, 2014.Colorado Rockies' Justin Morneau hits a two-run double off of San Francisco Giants pitcher Javier Lopez during the eighth inning of a baseball game in San Francisco, Sunday, June 15, 2014.