Brandon Crawford hit two home runs and the San Francisco Giants completed a three-game sweep, beating Atlanta 4-1 Sunday and handing the Braves their sixth straight loss.Atlanta Braves' Jason Heyward ducks an inside pitch from San Francisco Giants pitcher Madison Bumgarner during the first inning of a baseball game on Sunday, May 4, 2014, in Atlanta.San Francisco Giants starting pitcher Madison Bumgarner delivers to the Atlanta Braves during the first inning of a baseball game on Sunday, May 4, 2014, in Atlanta.Atlanta Braves starting pitcher Alex Wood delivers to the San Francisco Giants during the first inning of a baseball game on Sunday, May 4, 2014, in Atlanta.San Francisco Giants' Hunter Pence scores against the Atlanta Braves on an RBI by teammate Buster Posey during the first inning of a baseball game on Sunday, May 4, 2014, in Atlanta.