DENVER -- Tyler Anderson's run of three straight standout outings against National League West opponents was washed away by a streak that the Rockies need to put to an end.
Anderson struck out eight and held the D-backs to one run and three hits in six innings and had a one-run lead. But David Peralta's three-run homer off Jake McGee and A.J. Pollock's solo homer later in the seventh sent the Rockies to their ninth straight Coors Field loss to the D-backs -- the longest against any club since the park opened in 1995 -- 5-3 on Tuesday night.
The Rockies' only longer streak of home futility was 11 games against the Braves from May 6 of their expansion season in 1993 to Aug. 9, 1994. But the current streak against the NL West-leading D-backs is especially damaging for a team that's somewhere at the edge between contender and also-ran that could be dealing for the future when the July 31 non-waiver Trade Deadline hits in three weeks.
Why have the D-backs had such success at Coors?
"No particular reason," shortstop Trevor Story said. "We feel like we could've put up some more runs for 'Andy.' He threw really great."
"No reason -- just they've played better," Rockies manager Bud Black said.
The Rockies went 0-for-10 with runners in scoring position, leaving 12 men on base.
Nolan Arenado homered in the bottom of the seventh off Archie Bradley to tie the Brewers' Jesus Aguilar for the NL lead in homers with 23. However, the Rockies (46-45) fell to 4 1/2 games behind the D-backs -- a team they face twice more this series, plus in a three-game set at Chase Field immediately following the All-Star break.

The Rockies' bullpen, a problem for much of June, entered Tuesday having yielded no runs in its last four games, and one in the last six. But McGee walked Jeff Mathis to open the seventh, and watched Chris Owings double.
McGee fell behind Peralta, 1-0, and went to a slider, even though Peralta ranked fourth in the Majors against breaking balls (.358) before Tuesday, according to Statcast™. Peralta's 16th homer this season went out to right field -- 445 feet, his deepest tracked by Statcast™.

"It was second and third, and I was thinking if I could bounce it down and away, if he was going to hit it, he was going to hit it to an infielder and keep it second and third," said McGee, who has increased use of his slider. "But I didn't execute my pitch.
"I've been throwing it [the slider] a lot more lately the past few weeks. It's been working really well. Tonight, I just left them up a little too much."
Scott Oberg had not given up a run in five outings since returning from the disabled list with a back injury, but served up Pollock's 12th homer, to dead center field in the seventh.

"When you go to the bullpen and you're going to use three or four guys, you need them all to contribute, whether it's a zero or whether it's minimizing the damage," Black said. "Tonight, it just didn't happen."
Arenado's homer came in the bottom of the seventh, but Andrew Chafin entered with two out and two aboard, then forced a grounder from Gerardo Parra to escape the threat.
Anderson entered having thrown 16 scoreless innings in starts against the Dodgers and Giants. He yielded Nick Ahmed's 12th homer of the season with one out in the first, but no other runs followed. He worked around four walks -- his most since walking six on April 15 at Washington.
Because of the walks and pitching behind in the count too much for his liking, Anderson didn't consider Tuesday the continuation of his roll.
"I would say maybe I'd feel that way if tonight was a little bit better, but it was one of those things that you've just got to battle through it," Anderson said. "Every game is separate. Whether it's making pitches or not making pitches. As a team, we just want to win and compete."
Anderson walked Steven Souza Jr. and Ketel Marte to open the fourth. But after a visit from pitching coach Steve Foster, he fanned Jake Lamb, Mathis and D-backs starting pitcher Patrick Corbin (4 1/3 innings, five hits, two runs). In the sixth, Anderson walked Souza before striking out Marte and working a fly ball from Lamb.
"He was dialing it up," D-backs manager Torey Lovullo said of Anderson. "He did a great job. He was throwing his fastball on both sides of the plate. I think he made a couple of mistakes the whole day and hitters were very complimentary about his stuff."
MOMENTS THAT MATTERED
With Story on third base and Ian Desmond on first in the bottom of the fifth inning, Parra looked like he could drive in a few runs, especially after the D-backs had botched plays in left field and at first base that inning to give the Rockies what was then the go-ahead run. Chris Iannetta popped out ahead of him in what was a rough evening for the catcher, who left eight men on base.
Parra sent one deep into right field, but Souza made a running catch on the warning track to end the inning and the Rockies' hope of adding some insurance runs.

SOUND SMART
Fresh off his first All-Star bid, Story continued swinging away -- and connecting. Tuesday night marked the fifth consecutive multi-hit game for Story, which tied his career-high, set earlier this year, from June 8-13.
Story doubled in the fifth and singled in the seventh to the right side -- against a shifted infield -- to continue his streak.
YOU GOTTA SEE THIS
Had the Rockies flipped the game, a double play that featured a lightning-quick throw from right fielder Carlos Gonzalez would have been a key.
Reliever Adam Ottavino faced runners at first and third in the ninth inning, thanks to a leadoff Ahmed double, a wild pitch and a walk to Paul Goldschmidt.
Pollock flied to right, and Ahmed started toward the plate. However, he stopped as Gonzalez's throw zoomed in at 94.3 mph, according to Statcast™. Goldschmidt thought he could take second, but Gonzalez's throw gave Desmond time to relay to to DJ LeMahieu for the tag.

HE SAID IT
"We have an incredible team, regardless of how the results have been so far. We have a great team, and we can play anybody and beat anybody on any given day. So, that's the thing. Sometimes you lose sight of that when you're not playing your best baseball, but I think everyone here knows that. And they know that our lineup is deep. We're good from one to nine, and we have some guys who can throw the ball. We're going to compete and try to stay in games and try to win them." -- Anderson, on the Rockies
UP NEXT
Righty German Marquez (7-8, 4.92 ERA) is on a roll going into the matchup with the D-backs and righty Shelby Miller (0-3, 9.00) on Wednesday at 6:40 p.m. MT. In his last two starts, he is 2-0 with a 1.29 ERA, 14 strikeouts and no walks. But he must conquer some demons. He is 0-1 with a 5.00 ERA in two starts against the D-backs this year and 0-4, 4.47 in nine appearances (eight starts) in his career. He also is 2-5 with a 7.93 ERA at Coors this season in nine starts.