CC Sabathia is the resident ace based on past performance and salary.

Andy Pettitte, who went on the disabled list yesterday with an upper back muscle problem is the wise old head others go to for advice.

Then there is Hiroki Kuroda, who is easily the Yankees’ best pitcher.

Kuroda pounded that message into the Blue Jays last night in The Bronx, where he hurled the Yankees to a 5-0 victory was witnessed by an announced crowd of 40,008.

“Our starting pitching has been awesome and Kuroda has been doing it all year,’’ Vernon Wells said of the 38-year-old right-hander. “Tonight was a perfect example of that.’’

In eight innings, one shy of Kuroda’s season-high, he allowed two hits, a walk and fanned five.

Kuroda is 6-2 and has won four of his past five decisions. During that span he hasn’t given up more than three runs, and fired blanks twice.

After the three batters who followed Melky Cabrera’s leadoff double in the first, the Blue Jays didn’t have another batter up with a runner in scoring position against Kuroda.

“I felt good, definitely, especially in the first inning when I struck out [Jose] Bautista and [Edwin] Encarnacion,’’ Kuroda said of the first two outs of the opening frame that ended when Kuroda snagged J.P. Arencibia’s liner for the final out. “That put me in good condition.’’

The victory stopped a two-game Yankees slide and hiked the AL East leader’s record to 26-16.

After Cabrera’s game-opening double, Kuroda allowed a walk and a single across the next seven innings.

Kuroda received support from two unlikely sources: David Adams and Austin Romine.