Pinch-hitter Will Smith homered leading off the bottom of the ninth inning to give the Los Angeles Dodgers a 5-4 victory over the Arizona Diamondbacks on Sunday that prevented a three-game sweep. Los Angeles took a two-game lead in the NL West over rival San Diego, which lost 7-2 at Minnesota. Smith sent the second pitch he saw from reliever John Curtiss (2-1) a projected 420 feet into the left-center stands.