Mets third baseman Todd Frazier, proud New Jerseyan that he is, has been keeping an eye on the Garden State squad that just reached the Little League World Series.

Turns out they’ve been watching him for a lot longer. Matter of fact, the team wouldn’t even exist without him.

Elmora Youth Little League manager Jairo Labrador told The Post that it was Frazier’s exploits back in 1998 — leading Toms River (NJ) to the Little League World Series title — that inspired Elizabeth (NJ) to form Elmora, which was chartered the very next year.

And while Frazier had been rooting for Elmora and even retweeting pregame messages from the team’s account, he had no idea of the impact he’d had on their history, and was moved to find out.

“Wow. That’s pretty cool,” Frazier told The Post. “Ah, it makes me feel good. It’s very humbling. You never know who you’re going to inspire everyday no matter how old or young you are.”

Turns out Frazier was just 12 when he inspired the city of Elizabeth, and helped spawn a team that a generation later is leaving its own legacy today.

“For me it was crazy. In ‘98 we kind of took the world by storm. It was unbelievable. I don’t think any USA team had won in a while,” Frazier said.

It had been 1993 to be specific, until Toms River broke the American drought. And it was Frazier that not only went 4-for-4 with a homer, but was the winning pitcher and notched the game-clinching strikeout in a 12-9 win over Kashima Little League from Japan.

“We were that team, that underdog team that everybody was rooting for. So to hear that means a lot,” Frazier said. “I hope for the best. They look like a really good team. And hopefully I get to talk to them before a game and I’m excited for them. So to hear that is humbling. It’s very nice to hear.

“And you never know who’s going to come to the ballpark; that’s why you’ve got to try to play this game understanding that it could be this kid’s first day watching this game. Make an impression. That’s the biggest thing you can do. Try and smile, whether you get out or you hit a home run. Make a kid’s day. You don’t even have to talk to him; just by seeing how you act on the field, how you go about your business. And that’s very nice of (Labrador) to say.”

The Mets went for a clean sweep of Washington on Sunday that would’ve vaulted them past the Nationals and into no worse than a tie with St. Louis for the second NL wild-card spot.

Meanwhile, the Little League World Series begins Thursday in Williamsport, Pa. Mid-Atlantic champion Elmora faces the Northwest winners (Sprague Little League from Salem, Oregon) on Friday at 8 p.m.