DENVER Coors Field is a tough place to play any night, and the Giants only made the task more difficult Friday with a series of errors, both physical and mental.
Four errors and a very rough outing for Madison Bumgarner led to a 10-9 loss to the Colorado Rockies.
Bumgarner gave up a career-high nine runs, four of them coming on a grand slam on his final pitch.
A night after storming back from a six-run deficit, the Giants were the ones to take a big early lead. Marco Scutaro scored on Buster Posey's first-inning sacrifice fly and then drove in a run in the second. The Giants had four singles and a double in the second inning, scoring three runs against Jorge De La Rosa, who had not given up a run in two previous starts at home this season.
The Rockies got a run back in the bottom of the second inning, and the Giants gave them plenty of help in the third.
Pablo Sandoval made a throwing error on Eric Young's short hopper that would have been an infield single regardless, allowing Young to get to second. After Dexter Fowler reached on a close play at first, Carlos Gonzalez lined a single to center.
Young scored easily, and when Angel Pagan attempted to throw Fowler out at third, the ball bounced into the seats behind the visiting dugout. Fowler scored and Gonzalez was awarded third base; he scored a batter later to tie the score at 4-4.
The mental mistakes followed two errors in the first two innings and gave the Giants nine errors through the first 28 defensive innings of this trip.
For all the Giants have done wrong this week, they have been very good lately at producing with two outs. Two of the three runs in the second inning came with two outs, and Sandoval brought home another with a two-out, two-strike single in the fourth that drove in Pagan and gave the Giants a 5-4 lead.
The Rockies scored a quick run in the top of the fifth, and when Bumgarner walked D.J. LeMahieu to load the bases with two outs, it looked like his day was done. Bumgarner had thrown 101 pitches, but manager Bruce Bochy let him try to finish the inning. The next pitch, Bumgarner's 30th of the inning, was a hanging slider that Jordan Pacheco crushed into the left-field seats.
It was the first career grand slam allowed by Bumgarner, and put him in an unfortunate group: Every Giants starter has now given up at least six runs in a start this season.
The Giants tacked on three runs in the seventh but failed to add on because of Fowler's diving catch in center with two outs.