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.

Though Senga isn’t quite in the National League Cy Young running, 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’s been at his best over his last seven starts, allowing six runs over 32 ²/₃ innings for a 1.65 ERA.

And on Thursday, the Mets’ offense knocked around another of Arizona’s top starters.

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.