Tobias Myers wasn’t the headliner in the Mets’ blockbuster trade with the Milwaukee Brewers, but he was hardly a throw-in.

Included in the same offseason deal that brought over ace Freddy Peralta, the right-handed Myers is already impressing as a versatile reliever.

Myers hurled 1.1 scoreless innings in Monday night’s 4-2 win in St. Louis — a dominant outing in which he struck out the side in the seventh.

“He’s huge,” manager Carlos Mendoza said. “A guy [with] versatility. His ability to get lefties and righties out. That changeup is pretty good; changeup/split. He can give you multiple innings. He’s a guy that can give you an inning if we need [him] to. It’s a pretty important role for us.”

Myers entered with two outs in the sixth inning, replacing starter Clay Holmes after the Cardinals’ Nolan Gorman hit a solo home run.

The 27-year-old Myers then preserved the Mets’ two-run lead by retiring all four batters he faced, needing only 14 pitches to do so.

Myers finished off his seventh-inning strikeouts of Nathan Church and Pedro Pagés using his splitter. He then pumped a 92.7 mph fastball past Victor Scott II to complete his outing.

That lowered Myers’ season ERA to 2.08. He also tossed three innings of one-run ball in relief in the Mets’ 11-7 win over the Pittsburgh Pirates on Opening Day.

This is Myers’ third MLB season but his first time on an Opening Day roster. He spent time in the minors with six organizations before making his MLB debut with Milwaukee in 2024.

Myers was primarily a starter as a rookie with the Brewers, then operated in more of a swingman role last year.

While he does not throw especially hard, Myers keeps hitters off balance with five pitches, including that splitter. He entered Tuesday with a 3.12 ERA over 51 career appearances, including 31 starts.

“If you just put your head down and do what you’ve done for the most part, and try not to let everything else around you get in your head, success can come,” Myers told the Daily News during spring training. “And it can come quick.”

Barring an extension, Peralta — who is set to make his second start with the Mets on Wednesday — will become a free agent after the season.

But Myers came with three years of team control, helping to ease the sting of the Mets trading top prospects Jett Williams and Brandon Sproat to Milwaukee.

And while Myers could start for the Mets in a pinch, he has already demonstrated his importance to a new-look bullpen that entered Tuesday with a 2.00 ERA through 18.0 innings.

Myers was credited with a hold in each of his first two appearances, including on Monday when he was part of the bridge to new closer Devin Williams.

“They’ve done a really good job,” Mendoza said of the Mets’ relievers. “When you’re looking at, out of the gate, we’re playing two extra-inning games, we have to cover a lot of innings, and they’ve kept us in the game so far.

The manager added, “We’ve asked a lot out of a few of them out of necessity, but again, just continue to keep in mind the big picture here, and continue to protect guys when we need to.”