The Los Angeles Dodgers surged into the NL West lead with a superb September, yet have struggled to shake the Colorado Rockies. Eduardo Escobar homered off Kenta Maeda leading off the ninth inning, and the Arizona Diamondbacks tightened the NL West race with a 4-3 victory over the Dodgers on Tuesday night. Los Angeles (88-70) had won 10 of its previous 12 games to move into the NL West lead, but Colorado (87-70) pulled within a half-game of the NL champions by beating Philadelphia 10-3.