DENVER -- The Los Angeles Dodgers still are hoping to wrap up the NL West before they get to San Francisco, but they didn't look like they were in a hurry Friday night.

The Dodgers got a shaky outing from their starting pitcher and had a couple of ill-timed errors to lose to the Colorado Rockies 7-4 at Coors Field. Their magic number to clinch the division remained at three pending the outcome of the San Francisco Giants' game in Oakland.

How it happened: Mike Bolsinger had a rough evening at Coors Field. The low point was the fourth inning, when Colorado hit three solo home runs. The pattern went home run, out, home run, out, home run, out. One of the homers, by Carlos Gonzalez, was on an ankle-high curveball that he golfed over the center-field wall. All told, Bolsinger gave up seven runs on seven hits and three walks in just four innings, a rough outing even by Coors Field standards. Bolsinger’s ERA was spared some abuse, though, because a couple of Dodgers errors -- one by Bolsinger -- meant three of the runs were unearned.

The Dodgers offense has had a habit of scoring early and, sometimes, late, but taking the middle innings off. That happened again vs. David Hale, a right-hander who carried a 6.32 ERA into the game. The Dodgers scored a run thanks to Jimmy Rollins’ one-out triple in the first inning, but could do no further damage to Hale, who went five innings.

The Dodgers got good relief pitching and fought back for a few runs in the sixth and seventh innings, but Bolsinger dug them too big an early hole.

What it means: The Dodgers lost ground in their primary race at this point, the pursuit of home-field advantage in the NLDS. The New York Mets won, so they are now just a half-game behind the Dodgers. The Dodgers now are going to need help from Oakland to wrap up the division during this series as there are only two games remaining here.

Notable: Carl Crawford had a nice piece of hitting in the second inning, but he got a little over-eager while running. With the Rockies shifting to the right side, Crawford sliced a single to a vacated left side of the infield. Crawford assumed the ball would trickle into shallow left field, so he took a turn at first. Nolan Arenado hustled after it, though, and threw to first before Crawford could get back to the bag. ... The “Philly boys,” as manager Don Mattingly called Rollins and Chase Utley recently, continued to do some productive things for the offense. Batting in the first two spots in the order, they combined to get on base six times. ... Lefty Ian Thomas, the sole remnant on the 40-man roster from the Juan Uribe trade, gave the Dodgers two scoreless innings after Bolsinger left, giving the offense a chance to rally.

Up next: The series continues Saturday evening at 5:10 p.m. PT. Brett Anderson (9-9, 3.52 ERA) opposes Kyle Kendrick (6-13, 6.37 ERA).