TORONTO — With Luis Severino breezing through the Blue Jays and ready to close out a sixth straight scoreless inning Sunday, it wasn’t hard to see the Yankees winning three of four games heading into Monday’s day of rest.

“I thought he threw the ball really, really well,’’ Brett Gardner said of Severino, whose only mistake, a misplaced slider, was hit by Justin Smoak for a two-run, two-out homer to center in the sixth that tied the score. “I am sure Seve wishes he had that pitch back, but he still threw a really good game. We have to get more than two runs.’’

Two innings after Smoak got the Blue Jays even, Josh Donaldson took a slider in the middle of the plate from Tyler Clippard and drove it over the right-field fence for an opposite-field homer that lifted the hosts to a 3-2 victory in front of a sold-out Rogers Center crowd of 46,782.

“To pitch like Seve did today, you got to win the game,’’ said Clippard, who wanted a slider down and away and watched it cut through the top of the strike zone over the middle of the plate.

Combined with the second-place Red Sox beating the Orioles, the AL East-leading Yankees’ advantage was cut to two heading into the first of three games between the blood rivals Tuesday night at Yankee Stadium.

The 3-4 ledger on the road trip is an indication of how the past 17 games have gone for the 32-22 Yankees, who are 8-9 in that stretch.

“It wasn’t meant to be,’’ Gardner said of the loss. “We haven’t played our best baseball the last week or so.’’

In his previous two outings, both wins for Severino, the right-hander allowed one earned run and fanned 15 in 14 ¹/₃ innings. After walking leadoff hitter Kevin Pillar in the first inning, Severino retired eight straight and matched Blue Jays ace Marcus Stroman.

Severino pitched around Kendrys Morales’ one-out double in the fourth and negated Devon Travis’ leadoff single in the fifth by feeding Chris Coghlan a 4-6-3 double-play ball.

Then Smoak sent the first pitch into the second deck of the center-field seats.

“The slider didn’t do too much and Smoak has swung the bat all year and made us pay,’’ Joe Girardi said.

Aaron Judge’s legs helped the Yankees score the game’s first run in the fourth, and Gardner scored from third on Matt Holliday’s ground out in the sixth.

Judge, who was the first of three strikeouts in the ninth by Blue Jays closer Roberto Osuna, singled with one out in the fourth when the Yankees had a chance to plate more than one run. He stole second and moved to third when catcher Luke Maile’s throw went into center field. Holliday followed with an RBI double and the Yankees were poised for more.

But Stroman induced Starlin Castro to ground out and ended the inning by getting Aaron Hicks to pop out.

“You could have said it would have been a good road trip if we had won [Sunday],’’ Girardi said. “It’s an OK road trip. You don’t want to have a losing road trip. We were 2-2 against these guys, 1-2 against Baltimore and we had a chance to win Monday’s game and [Sunday’s] game. It was an OK road trip.’’

Now it’s the Red Sox for three in The Bronx, where the Yankees are 17-8 compared to 15-14 away from the Stadium. The Yankees will look to stop spinning their wheels like they have in the past 17 games, and stop flushing pitching gems like they did Sunday.