With one dramatic swing, Nolan Arenado gave the Colorado Rockies a thrilling victory and finished off his rare feat at the plate. Arenado completed the cycle with a three-run homer in the bottom of the ninth inning, and the Rockies stunned the San Francisco Giants by rallying for a 7-5 win Sunday. Arenado hit the first pitch he saw from All-Star closer Mark Melancon (1-2) into the left-field seats to cap a four-game sweep.