For six more innings Sunday afternoon, Noah Syndergaard labored, and then chose to look on the bright side.

“I keep on getting those mediocre starts out of the way so I can dominate in September, I guess,” Syndergaard said after the Mets’ 3-2 loss to the Rockies at Citi Field.

The hard-throwing righty gave the Mets a chance to win again, as he has done in all eight of his starts this season, but he still hasn’t completely found the dominant Syndergaard of old.

Syndergaard was not sharp, allowing six hits, four walks and two runs while striking out five over six innings, leaving in a tie game before the Rockies went on to win it against Hansel Robles.

“I don’t think we’ve seen the best of Noah Syndergaard yet,” manager Mickey Callaway said. “His tempo was real slow in between pitches. He just didn’t look comfortable out there.”

Syndergaard attributed the poor tempo and lack of rhythm to focusing too much on his mechanics and trying to miss bats instead of executing his pitches.

“I just gotta get out of the habit of thinking too much out there,” he said.

On the same day fellow ace Jacob deGrom was placed on the 10-day disabled list, Syndergaard was unable to put the Mets on his back. He is now 2-1 with a 3.09 ERA, and after the Mets won the first five games he started, they have lost his last three.

Syndergaard’s four walks were the most he’s allowed since Sept. 7, 2016. He hadn’t yielded more than two free passes in any of his past 15 starts before Sunday. Two of the walks came in the third inning, one to load the bases and the next on four pitches to force in a run that tied the score 2-2. It was the first time in Syndergaard’s career he walked in a run.

Needing 95 pitches (57 strikes) to get through the sixth, Syndergaard did not have any clean innings.

The good news for the Mets is that Syndergaard sounded like he had a plan to fix it. He spoke about wanting to elevate his fastball more to generate swing-and-misses while also diagnosing a mechanical flaw.

“I’m kind of leaking my front side open a little too early, allowing hitters to see the ball a brief second faster than they should,” he said. “Just having that ability to stay closed longer will add more deception to my fastball.”