TORONTO — For the first time this series, the Yankees and Blue Jays played a game on Wednesday night in which the only real action occurred within the foul lines.

There just wasn’t much of it going on.

Instead, Gerrit Cole and Chris Bassitt locked into a pitchers’ duel for 6 ¹/₂ innings before handing the shutout over to a battle of the bullpens that kept it going to extras.

The dam finally broke in the bottom of the 10th, when Danny Jansen hit a walk-off home run off Wandy Peralta to lift the Blue Jays to a 3-0 win over the Yankees at Rogers Centre.

The Yankees were using a five-man infield after the Blue Jays had runners at the corners with no outs, and it worked initially when Peralta induced a groundout. But Peralta’s first pitch to Jansen was clobbered into the left-field seats, giving the Blue Jays their first win of the series.

The Yankees had a runner on third with one out in the top of the 10th but could not get him the final 90 feet as Jordan Romano struck out Gleyber Torres and Anthony Rizzo around an intentional walk to Aaron Judge.

With Domingo German accepting his 10-game suspension for Tuesday’s failed foreign-substance check shortly before first pitch, the Yankees began playing a man short on Wednesday. That put some onus on Cole to provide length, especially with the bullpen having the cover six innings on Tuesday night.

Cole only had one clean inning all night, but he worked around trouble to deliver six scoreless frames. He gave up back-to-back singles to start the bottom of the seventh before being pulled at 104 pitches.

Clay Holmes came in from the bullpen to face the heart of the Blue Jays’ order and delivered in the clutch. He got Bo Bichette to pop out, Daulton Varsho to strike out and Matt Chapman to ground out to escape the threat.

Bassitt, meanwhile, tossed seven shutout innings to extend his scoreless streak to 27 innings. The former Mets right-hander scattered just three singles, one walk and one hit batter, allowing only one Yankee to reach second base all night.

Fresh off Bassitt’s departure, the Yankees put together their best scoring chance of the night in the eighth inning. Judge drew a two-out walk against Yimi Garcia before left-hander Tim Mayza came on to walk Rizzo and DJ LeMahieu to load the bases.

Anthony Volpe then came up as a pinch hitter for Jake Bauers but struck out looking, leaving the bases loaded.

The Blue Jays had a chance to take the lead in the bottom of the eighth, but Volpe’s defense saved Jimmy Cordero and the Yankees. With runners on first and second and no outs, Alejandro Kirk hit a liner to shortstop. Volpe ranged to his left to snag it, and in one fluid motion, threw to second base to double off Cavan Biggio.

One batter later, Cordero was out of the jam.

Michael King then worked around a pair of walks in the ninth inning to send the game to extra innings.