DENVER — Jon Gray tossed six strong innings in another solid outing for Colorado starters, and the Rockies beat the Pittsburgh Pirates 6-2 on Wednesday.

Garrett Hampson had four hits for the Rockies, who swept the three-game series and improved to 28-16 at home. Colorado is just 6-31 on the road.

A day after being no-hit by Germán Márquez for eight innings, the Pirates jumped on Gray for their first runs of the series. Adam Frazier led off the game with a triple, scored on a sacrifice fly and Bryan Reynolds hit his 14th homer for a quick 2-0 lead.

“I saw the first two pitches and then sold out for the heater,” Reynolds said.

Gray (5-6) didn’t give up another hit before leaving four a pinch-hitter in the sixth. He walked four -- one intentional -- hit a batter and struck out five to continue the strong run of outings by Colorado starters.

“A start like this is the ones I appreciate the most,” Gray said. “You can be down three or four runs early on and you stretch it out to six innings, seven innings sometimes, our offense has a chance to catch up.”

Gray needed 27 pitches to get through the third and worked around traffic in the fourth and fifth innings. He finished with 95 pitches, 52 for strikes.

“It says a little something about Jon’s competitiveness, his ability to make pitches in certain parts of the game,” manager Bud Black said. “We’ve seen him sharper but he battled through it. Jon deserved the ‘W’ in this one because he battled hard.”

The three starters in the series combined to allow just two runs and six hits over 20 innings. Pittsburgh finished with only nine hits in the three games.

“We came into this series swinging the bats pretty well in St. Louis and did not swing the bats well this series at all,” Pirates manager Derek Shelton said.

C.J. Cron led off the Colorado fourth with his 11th home run. The Rockies scored two more in the fifth off Pittsburgh starter Chad Kuhl (2-5).