There are few surer things in baseball right now than David Peterson mowing down the Washington Nationals.

Stick the Mets left-hander on the mound against this particular lineup, and you probably know the results before he ever throws a pitch. Just let Peterson throw his tantalizing assortment of 90 mph sinkers, breaking balls and changeups and watch as the Nats continue to flail away, making precious little solid contact.

It’s happened before. It happened again tonight. And unless the Nationals’ position players actually do something to adjust, it’s pretty much guaranteed to happen again the next time they meet.

Tonight’s 8-1 loss might have stood out if not for the fact it was a near-repeat of Peterson’s last start against the Nats, when he tossed a six-hit shutout at Citi Field.

They didn’t score off him the time before that, either. All told, Peterson had thrown 25 consecutive scoreless innings against the Nationals before they finally broke through in the bottom of the eighth tonight. And the dominance isn’t confined to this current inexperienced lineup. During a career that began in 2020, Peterson has now faced the Nats a total of 14 times (11 of them starts). The Mets’ record in those games: 13-1.

NEW YORK – Manager Davey Martinez was hoping to get some “thump” from his right-handed-heavy lineup. The Nationals rank in the lower third in the National League in batting average and OPS against left-handed pitching.

Although a new-look lineup featured six right-handed hitters, they faced a tough task in Mets southpaw David Peterson, who entered the night with a 2.80 ERA.

And try as they might, there was no “thump” to be had. In fact, there was anything but “thump” from the Nats during this 5-0 shutout loss in front of 40,681 fans at Citi Field.

Peterson, who also owned a not-so-impressive 1.259 WHIP at the start of the game, held the Nationals to just six hits without any walks while completing the first complete game and shutout of his six-year major league career.

“I think he was just getting ahead and getting early contact," said James Wood. "I think that let him go the distance today.”