With 115 pitches under his belt, Jacob deGrom exhaled, reached back and blew a 97 mph fastball past Cubs catcher Willson Contreras to solidify a 6-1 New York victory, and the first complete game by a Mets starter this season.

It was the second complete game of deGrom’s career en route to his fifth win of the season (9.0 IP, 1 R). DeGrom struck out six and walked four.

The right-hander’s other career complete game came on July 17, 2016 at Philadelphia. It was the fourth outing of deGrom’s season allowing one run or fewer.

It was a sigh of relief for the Mets ace, who was touched up to the tune of 15 runs and 18 hits across his previous two starts.

“The two starts before that I got my teeth kicked in,” deGrom said. “[I] definitely wanted to have a good one. Those guys made great plays behind me. I noticed early that I had a pretty good changeup which I haven’t really had a lot this year. I was able to locate pretty much whenever I wanted.”

DeGrom has now allowed one run or fewer in 39 of his first 89 career starts, the second-highest total in Mets history through a starter’s first 89 career starts, behind Dwight Gooden, who had 40 such games in his first 89 career starts.

Monday’s outing marked the sixth consecutive start where a Mets starting pitcher has allowed one run or fewer.

The last time Mets starters had such a streak was May 20-28, 2010 when they allowed one run or fewer in a franchise-record eight consecutive starts. The pitchers who accomplished the feat then were John Maine, Hisanori Takahashi, Mike Pelfrey, Johan Santana and R.A. Dickey. (Research courtesy of the Elias Sports Bureau).

Over the current streak, Mets starters have a 0.87 ERA (four earned runs/41.1 innings).

DeGrom made a minor tweak in his delivery on Monday and saw the results in his changeup, which hasn’t been as strong as it should be in recent outings.

“When I fly open, it’s not good,” said deGrom in regards to his delivery. “That’s when it floats in there and seems to get hit. But if I stay closed and on top of the ball that’s normally when my changeup is good.”

With the victory, deGrom boosted his record to 5-3 on the season and lowered his ERA to 4.33.

“This guy is one of the best pitchers in the league in my opinion,” Collins said.

The lone flaw that blemished deGrom’s strong outing was Yoenis Cespedes exiting the game in the sixth inning with a sore left heel.

Cespedes, who just recently returned after missing 37 games, gave the Mets a scare, but reportedly left for precautionary purposes.

“You don’t want to aggravate the injury I’m coming off by aggravating something else,” Cespedes said through his interpreter.

We have seen what the Mets can do when they have all hands on deck, so one can only hope for deGrom to repeat the success he had on Monday and that Cespedes’ injury is as minor as what is being said.