NEW YORK -- For the second straight game, a New York Mets rookie starter dominated the Colorado Rockies, only for the Rockies to pounce on the bullpen.
This time, Collin McHugh made an impressive first impression in his major-league debut, throwing seven shutout innings and striking out nine for the Mets.
But the Rockies jumped on reliever Bobby Parnell, with Tyler Colvin tripling on the second pitch he saw in the eighth and Chris Nelson knocking him in with what was the game-winning single in a 1-0 win Thursday.
It added up to Colorado's fifth straight win and the Mets' fifth consecutive loss. It also was the Rockies' eighth win in a row at Citi Field.
The victory followed Wednesday's win, in which the Rockies' Wilin Rosario homered on the second pitch he saw in the seventh after Mets rookie Matt Harvey had thrown six innings of one-run ball.
Colorado completed the three-game sweep thanks to another strong performance in its pitcher-by-committee style. Starter Tyler Chatwood pitched three shutout innings while Adam Ottavino followed with two scoreless innings.
Rex Brothers (8-2) added two more shutout innings and Will Harris escaped the eighth after giving up a two-out double to Ruben Tejada. Harris struck out Josh Thole to end the inning.
Justin Turner hit a pinch hit single off Matt Belisle to lead off the ninth and Jordany Valdespin bunted him to second. But Belisle got Daniel Murphy on a fly to left for the second out and David Wright on a fly to right to earn his first save of the season.
Filling in after Johan Santana was placed on the disabled list, McHugh cruised through the first seven innings, pitching two-hit shutout ball. He walked just one batter.
After giving up a double to Charlie Blackmon, the first hitter he faced, McHugh retired the next three batters, striking out two straight to end the inning. He did not allow more than one base runner in any inning, and retired the side in order five times, with help from a caught stealing in the third.
The 25-year-old should raise some eyebrows with his performance after waiting four years to make it to the big leagues and getting drafted in the 18th round in 2008.
But the offense couldn't get McHugh a lead and the Rockies pushed across the one run against Parnell (2-3).
Mets manager Terry Collins juggled his struggling lineup, moving Valdespin to the leadoff spot, but it didn't help.
Valdespin walked in his first at-bat and stole second, but Chatwood retired the next three batters. He singled to lead off the third, but was caught stealing. The Mets later put two runners on, with a single by Wright and walk by Ike Davis, but Chatwood got Scott Hairston to fly out to center.
Chatwood lasted three innings as part of the Rockies' method for limiting their starters to 75 pitches. Colorado initially made the move while using a four-man rotation, but manager Jim Tracy said he will continue the limit now that the Rockies are back to a five-man set. Tracy said if a starter is pitching well and is economical with his pitches, he could allow him to go deeper.
Chatwood gave up three hits and walked three while throwing 65 pitches.
NOTES: Right-handed prospect Jenrry Mejia will be a September call-up and should get a "start or two," Mets manager Terry Collins said in his morning press briefing. ... Rockies center fielder Dexter Fowler remained on crutches Thursday morning after spraining his right ankle Wednesday night. He's listed as day to day but said after Wednesday's game he expected to be out a few days. ... Rockies shortstop Josh Rutledge (tight left quad) was available only for pinch hit duty Thursday and was day to day for more than that. He singled in the eighth. ... U.S. Olympic all-around gymnastics gold medalist Gabby Douglas threw out the first pitch before the game. Douglas, from Virginia Beach, said she had not yet met fellow Virginia native David Wright, but later did, taking photos with the Mets' third baseman. Douglas, offering the bright smile she's become known for, said she was nervous about throwing the first pitch after bouncing one in a minor-league game, but threw the pitch on a fly.