Of the four high-priced starters the Mets had at the top of their rotation entering the season, there were as many questions surrounding Kodai Senga as there were around the rest of the veteran hurlers combined.

But in his first season in the majors, Senga has proven to be by far the Mets’ best pitcher, while Max Scherzer is in Texas (and hurt), Justin Verlander in Houston and Jose Quintana pitching well in Queens, but only after missing half the season with a rib fracture.

Then there’s Senga, who — amid the wreckage of this Mets’ season — has proven he can be a top-of-the-rotation starter.

In Thursday’s 11-1 win over the Diamondbacks, the right-hander was especially dominant over six shutout innings, using his ghost fork effectively throughout his 98-pitch outing.

Senga retired 15 of the first 16 batters he faced and struck out 10 batters for the fifth time this season.

Ex-Met Tommy Pham’s two-out single in the first was Arizona’s only base runner until Emmanuel Rivera’s leadoff base hit in the sixth.

What made Senga so overwhelming, according to Buck Showalter, was the effectiveness of his ghost fork from the beginning of the outing.

“His feel for the [pitch] early,’’ Showalter said. “They have to honor it. He’s got enough pitches to survive without it, but he had it going.”

Of his first seven strikeouts, Senga finished five of them with the ghost fork.

Though Senga isn’t quite in the running for the National League Cy Young award, with San Diego’s Blake Snell, the Cubs’ Justin Steele and Atlanta’s Spencer Strider seemingly the top three, Senga lowered his ERA to 2.95, good for third in the NL.

He may have a better shot at the NL Rookie of the Year award, competing with Arizona outfielder Corbin Carroll.

Senga said through an interpreter that he had “no idea” what his chances are for the award.

Showalter said Senga “has got to be thought about. He’s somebody that’s gonna be in the discussion. A lot of those things are [decided by] how you end up and he’s certainly doing his part.”

He’s been at his best over his last seven starts, allowing six runs over 32 ²/₃ innings for a 1.65 ERA.

Meanwhile,, the Mets’ offense knocked around another of Arizona’s top starters Thursday. After torching Zac Gallen for seven runs in six innings on Wednesday, the Mets pounded right-hander Merrill Kelly for seven runs in five innings.

Kelly pitched well in three of his previous four outings, but walked the bases loaded with no one out in the third and Brandon Nimmo made him pay with a two-run double to right.

The Mets poured it on in the fifth, when five straight batters reached with one out and all of them scored, with Pete Alonso and DJ Stewart delivering RBI hits before Jeff McNeil’s two-run homer made it 7-0.

It was the first time the Mets scored at least seven runs in three straight games since last September.

The victory was also the Mets’ fourth in their last five games, all against Arizona and Minnesota. Both teams are in the middle of the playoff hunt, although the Diamondbacks haven’t looked the part.

On Thursday, a lot of that had to do with Senga.

“He figures out a way to adjust to things,’’ Showalter said. “He’s pretty much been that way since [he’s been here]. … He’s been a great addition and a good signing by our guys.”