TORONTO — In a league with intense scouting, 162 games of evidence to pore over and daily pitching and hitting meetings to relay thoughts and observations from obsessive scouting and analytical minds, the Blue Jays perfectly executed what is so hard to execute:

An October surprise.

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Yes, the Yankees knew they would be facing Trey Yesavage on Sunday. But no, they did not appear to have any feel for how to attack a pitcher with 14 career major league innings and with unique stuff that comes out of a unique delivery from a 22-year-old with what sure looks like a unique makeup.

The rookie who reminds of the Mets’ Jonah Tong — utilizing a delivery that is as over the top as possible and unleashing disappearing splitters, fastballs that give the appearance of rise, plus sliders that dive under bats — turned the biggest game of his life into the best game of his life in what became a 13-7 crushing of the Yankees at Rogers Centre.

“It just comes down to the funky release,” said Ben Rice, who chased splitters for two strikeouts in his only at-bats against Yesavage. “Just kind of playing [the splitter] off that fastball. It’s something I think we were a little unfamiliar with.”

The Yankees, of course, could and did watch video of Yesavage’s few outings against the Rays and Royals in September, plus his 98 innings across four minor league levels this season.

But there is a difference between seeing the stuff on film and then seeing such a rare arm slot from the batter’s box.

“It was definitely something you had to adjust to,” Rice said.

The Yankees were not able to adjust. Yesavage did not allow a hit through 5 ¹/₃ brilliant and scoreless innings in which he struck out 11.

He threw his splitter 29 times, 19 of which were either called strikes or swings and misses.

The Yankees swung at 16 and missed 11. They could not differentiate the fastball, which remained at the top of the zone, from a splitter that was heading to the top of the zone until it began its plunge.

“Good deception,” said Giancarlo Stanton, who swung through a slider and grounded out on another slider against Yesavage.

“It was tough. First time seeing him,” said Aaron Judge, who cited the release point as the biggest source of difficulty. “Keeping us in between a little bit all night.”

Against the heart of the Yankees order in the fourth, Yesavage used high heat to put away Judge, turned to the splitter that put Cody Bellinger on one knee during a swing-and-miss and again used that splitter to sit down Rice to strike out the side.

The Blue Jays, who left a building-up Chris Bassitt and a struggling Max Scherzer off their ALDS roster, tabbed a top prospect with three career starts to take the ball for Game 2.

None of those innings had been against the Yankees, which mattered.

“This has got to be cloud nine,” said Yesavage, who was pulled by a heavily booed manager John Schneider with a 12-0 lead after 78 pitches and took a curtain call from a sold-out Toronto crowd. “I couldn’t imagine a better feeling right now.”