DENVER -- Coors Field is a tough place to play even when you're doing everything right. The Giants did a lot of things wrong on Friday, and they paid the price.
Four errors and one grooved cutter by Madison Bumgarner led to a 10-9 loss to the Colorado Rockies, snapping the Giants' 10-game winning streak over the division rivals. The Giants have given up 37 runs while losing three of the first four games on this road trip, and Friday's theme was a repetitive one.
"We shot ourselves in the foot," manager Bruce Bochy said. "In this ballpark the walks and errors are going to kill you. We beat ourselves today, it's pretty simple."
A night after storming back from a six-run deficit, the Giants were the ones to take a big early lead. They scored four runs in the first two innings against Jorge De La Rosa, who had not given up a run in two previous home starts this season.
The Giants led 4-1 despite two early errors, but in the bottom of the third inning, the wheels came off. Pablo Sandoval made a throwing error on Eric Young's short hopper that would have been an infield single regardless of Sandoval's effort. Young took second and Dexter Fowler reached on a bunt.
Carlos Gonzalez followed with a lined single to center, and Angel Pagan tried to get Fowler at third, but instead threw the ball into the seats behind the visiting dugout. Fowler was awarded home and Gonzalez, who should have had just an RBI single, ended up on third. He scored a batter later to tie the game.
The two-error inning was the third of the road trip for the Giants, who have made nine errors in the last four games.
"Some things are hard to explain, but it shouldn't be happening," Bochy said. "We let them get back into the game because of our mistakes. The last few games we're making way too many errors, and we've got to tighten things up. We've got to play more of our type of game."
That includes quality pitching, but Bumgarner, the ace of the staff this season, was roughed up like the three starters before him on this trip.
The Giants took a 5-4 lead on Sandoval's two-out single in the top of the fourth, but the Rockies scored a quick one in the fifth and then Bumgarner loaded the bases with a single and two walks. Bumgarner was at 101 pitches for the game and 29 for the inning when he walked D.J. LeMahieu. Bochy, as he often does, let his starting pitcher try to clean up of his own mess.
"Sure, those are tough calls," Bochy said. "But at that point, those are his runners and I'll give him a chance to get out of it."
Bumgarner appreciated the decision and said he felt fine physically. But he put a first-pitch cutter to Jordan Pacheco right down the pipe, and Pacheco crushed it to left, giving the Rockies a 9-5 lead.
It was the first career grand slam allowed by Bumgarner.
"I wish I could have made him look good," Bumgarner said of Bochy's decision.
It ended up being Bumgarner's final pitch, but it wasn't anywhere near the end of the scoring.
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. Buster Posey hit a solo homer in the eighth, but Rafael Betancourt struck out the side in the ninth.
Bumgarner was charged with a career-high nine runs, seven of them earned, in 42/3 innings. Every Giants starter has now given up at least six earned runs in a start this season.
"It was nothing," said Bumgarner, who didn't think Tulowitzki was trying to rattle him.
Tulowitzki said he simply saw a mark on the ball and thought it should be replaced.
"I have too much respect for that guy and don't think he would do anything," Tulowitzki said. "I didn't think they were cheating. Respect the game and let's get rid of (the ball) and move on."
For more on the Giants, see Alex Pavlovic's Giants Extra blog at blogs.mercurynews.com/Giants.