The Los Angeles Dodgers' hold on the NL West lead is about to be challenged directly by their closest pursuer. For now, they'll try to at least maintain their advantage behind Dan Haren. With a key three-game series against the San Francisco Giants looming, Haren goes for another strong performance as the Dodgers attempt to bounce back from a loss against the San Diego Padres on Wednesday night. Los Angeles (82-63) leads the West by 2 1/2 games over San Francisco with the rivals set for three games at AT&T Park this weekend before another three-game set at Dodger Stadium from Sept. 22-24.