Nolan Arenado hit a go-ahead homer leading off the fifth and Franklin Morales outdueled Madison Bumgarner, lifting the Colorado Rockies to a 2-1 win over the San Francisco Giants on Tuesday night.San Francisco Giants starting pitcher Madison Bumgarner throws during the first inning of a baseball game, Tuesday, April 22, 2014, in Denver.Colorado Rockies' Wilin Rosario looks at the San Francisco Giants bench before the start of the baseball game, Tuesday, April 22, 2014, in Denver.Colorado Rockies starting pitcher Franklin Morales throws during the first inning of a baseball game, Tuesday, April 22, 2014, in Denver.Colorado Rockies starting pitcher Franklin Morales throws during the first inning of a baseball game, Tuesday, April 22, 2014, in Denver.