PHOENIX -- Paul Goldschmidt broke out of a season-worst home run drought while tying a career high with five RBIs Sunday, all in a day's work for the most productive player in the National League.
Goldschmidt blasted his 32nd homer among four hits while increasing his NL RBI lead to 114 in the Arizona Diamondbacks' 8-2 victory over the Colorado Rockies at Chase Field on Sunday. It was his first homer in 83 at-bats.
"I knew it had been awhile," Goldschmidt said. "That's the way the game is. You just try to have good at-bats, and stuff like that kind of happens.
"I don't even know how to hit them. I just try to hit the ball hard. There is no reason to try to do anything different."
Goldschmidt's homer off Jhoulys Chacin (13-9) struck the batter's eye in center field and gave the D-backs a 3-0 lead in the third inning. The early lead helped propel Randal Delgado (5-6) to his first victory in six weeks.
"Today was another good day for him, and he's done it may times for us," Arizona manager Kirk Gibson said. "It's welcome what he does. He's just had a great year for us."
Goldschmidt, one homer behind Pittsburgh's Pedro Alvarez for the NL lead, singled home a run in the first inning. His two-out, two-run double, after a error by Rockies shortstop Troy Tulowitzki, capped a three-run fourth to give Delgado a 6-0 cushion.
Delgado gave up two runs and five hits in six innings for his first win in eight starts, since a 7-6 decision in Boston on Aug. 2.
Pinch hitter Charlie Culberson hit a two-run home run to break up Delgado's shutout in the fifth inning. Delgado has given up 21 home runs in 106 1/3 innings this season.
"I felt good with my three pitches," Delgado said. "I had good location, too, even the home run. It was down in the zone. You can't do anything."
Arizona rookie third baseman Matt Davidson had two hits, including his first major league homer, a bases-empty shot in the fifth inning.
The D-backs (75-73) have won three of four entering a four-game series against the National League West-leading Los Angeles Dodgers that begins Monday at Chase Field. The Dodgers would clinch the division title with two wins in the series.
Tulowitzki, Charlie Blackmon and Jonathan Herrera had two hits apiece for Colorado (68-82), which has lost six of its last eight. The Rockies were playing their first game since Todd Helton announced his Saturday night that he'd retire after the season. Helton didn't play Sunday.
After a 7-5 victory in the first game of the series, the Rockies scored two runs in each of the last two games while falling to 27-51 on the road.
"It's been a struggle offensively on the road," Colorado manager Walt Weiss said. "We threw up a big inning the other night here, but it's been a struggle for us to do that on the road. It's important to finish the drill and play hard through the end."
Chacin, who was 4-2 with a 2.67 ERA in his career against Arizona, gave up seven hits and six runs (four earned) in four innings.
"I just wasn't throwing strikes," Chacin said. "I was pitching up, overthrowing my pitches. I didn't make any pitches at any point in the game."
Arizona leadoff hitter Adam Eaton singled and stole second in the first inning before scoring on Goldschmidt's single. Eaton had two hits and scored twice.
Goldschmidt homered after a walk to Aaron Hill in the third.
NOTES: The Diamondbacks paid tribute to Helton in his last game at Chase Field on Sunday. Helton was shown on the message board in center field before the second inning while his many accomplishments were read over the public-address system. Helton took off his cap and waved to the crowd. He has 35 homers and 135 RBIs in 226 games against the D-backs, with one more series to play against them next weekend at Coors Field. ... Arizona RHP Trevor Cahill, who will face the Dodgers on Monday, is 5-0 with 2.04 ERA in nine career starts against Los Angeles. Cahill has given up three earned runs in 20 1/3 innings against the Dodgers this season. ... Although no announcement has been made, Colorado is expected to start RHP Collin McHugh against the St. Louis Cardinals on Monday after pushing back LHP Jorge De La Rosa (thumb) for at least a day. McHugh spent most of the season in the minors. He was obtained in the midseason trade that sent OF Eric Young to the New York Mets.