The Los Angeles Dodgers took a step back in their bid to win the NL West after failing to come up with the timely hits that had keyed their winning streak and dominance against the Colorado Rockies. Rediscovering that effort at the plate could be difficult against Jorge De La Rosa at Coors Field. The West-leading Dodgers look to avoid their first back-to-back losses of September on Wednesday while denying the NL-worst Rockies their eighth straight home win when De La Rosa starts. Los Angeles (86-65) built a four-game division lead by outscoring its opponents 32-5 during a three-game winning streak that included two victories over second-place San Francisco.