David Peterson doesn’t want to make any dramatic changes.

He’s trying, instead, to figure out what he did last year, before ill-advised adjustments threw his career into a tailspin. 

This past Tuesday, the 27-year-old southpaw finally pitched as he had last season, before those tweaks to his delivery. The 7-2 win over the Brewers marked a successful return to the big leagues for Peterson, who had previously been sent down to Triple-A Syracuse. 

Peterson tossed six shutout innings, allowing five hits and three walks while striking out five batters.

He is scheduled to start the Mets’ series finale against the Giants on Sunday. 

“Just kind of getting back to a full picture of where I was mechanically last year,” Peterson told The Post on Saturday before the Mets’ afternoon clash with the Giants. “And then also my mindset of, one pitch at a time, go compete, slow the game down instead of worrying about things that I can’t control or stuff like that.

Just getting back into a good spot there, and then also getting my pitches, especially the slider, back to where I want them.” 

Peterson went 1-6 with an 8.08 ERA in eight starts before his demotion this year, and he pitched to a 4.86 ERA in seven starts at Triple-A before his call-up.

Last year, Peterson owned a 3.83 ERA. 

The pitch that is most pivotal to Peterson’s success has gone the most awry. His slider was one of the best pitches in MLB last year, with hitters batting .175 against it, per Baseball Savant.

Additionally, Peterson had a 47.9 percent whiff rate with his slider in 2022.

This year, batters are hitting .367 against Peterson’s slider, and his whiff rate has fallen to 36.4 percent with the pitch. 

“It was kind of a feel thing for me,” Peterson said. “I was feeling something that, it felt like how it was supposed to. But when we broke it down, and looked at it in terms of the movement it took and everything, kind of getting back to the way I need to throw it for it to be my slider. 

“A lot of it was, I came into spring training a certain way, and I kind of switched my hands down low. Kind of getting back to my old mechanics in terms of keeping my hands high the whole time and allowing that to dictate the tempo of my windup and my motion.

“It was just getting the rhythm and tempo back to where I want it to be. And then from there, just executing pitches.”