PITTSBURGH — An impressive ninth-inning rally wasn’t quite enough.

With their bats in a deep freeze for eight innings on a raw Sunday afternoon against the Pirates, the Yankees scored three times in the ninth to force extra innings.

But after they stranded two runners in both the 10th and 11th innings, the Pirates pushed one across. Tommy Pham singled home designated runner Jack Suwinski to hand the Yankees a 5-4 loss in 11 innings on a 40-degree day at PNC Park.

“Great job by the guys bouncing back,” Aaron Boone said. “You always want to push one across, obviously, in the extra frames. We weren’t able to do that… not being able to push it across a few times just caught up with us. A little bit of a tough day for us offensively, but a what a great rally in the ninth to get us back into it.”

With one out in the 11th and Pham at the plate facing closer Devin Williams, Suwinski stole third. Pham fouled off three straight full-count pitches before banging a changeup off the wall in left-center to win it.

“Just trying to keep it down on him,” Williams said. “He put some good swings on balls and really made me work there in that at-bat.”

Luke Weaver preceded Williams to the mound with scoreless innings in the ninth and 10th.

The Yankees (6-3), whose offense scored 72 runs in the first eight games — an outburst that included an MLB-best 25 homers — produced just one run and five hits entering the ninth. Pirates lefthander Andrew Heaney, a forgettable Yankee trade-deadline acquisition in 2021, struck out 10 in seven innings.

The Yankees rallied for three against lefty Ryan Borucki. Anthony Volpe reached on an infield single with one out and, after Jasson Dominguez walked with two outs, Oswald Peraza roped an RBI double down the leftfield line to make it 4-2, putting runners at second and third. Trent Grisham, one of the Yankees’ hottest hitters to start the year (now hitting .455 with 1.447 OPS), tied it at 4 with a single to right on a 2-and-2 sweeper.

Peraza, a one-time top-rated organizational prospect who made the club out of spring training in large part because he is out of options, started for a second straight game at third base after collecting two hits on Saturday.

“Just taking advantage of those opportunities,” Peraza said through his interpreter. “Thank God I was able to come through there. That’s a big moment for the team. Just working hard for moments like that when the opportunities come.”

Heaney, who went 2-2 with a 7.32 ERA for the Yankees in 2021 and allowed 13 home runs in 12 games, allowed one run — a first-inning RBI double by Jazz Chisholm Jr. — five hits and a walk on Sunday. The veteran, whose fastball barely surpasses 90 mph, was especially sharp with his sweeper, curveball and changeup.

“I thought he had a really good mix,” Boone said. “He used kind of everything and, even from our view from [the dugout], just seemed very unpredictable.”

Rookie righthander Will Warren looked good for 2 2/3 innings but then ran into trouble. He lasted just four innings, allowing four runs and six hits, striking out five and walking one. After retiring the first eight hitters, he walked No. 9 hitter and former Yankee Isiah Kiner-Falefa with two outs in the third. Three straight hits followed, including Bryan Reynolds’ two-run double. The Pirates (3-7) scored two more in the fourth, on Pham's sacrifice fly and Kiner Falefa's RBI double.

“Two-out walks can’t happen,” Warren said. “That’s where they get you.”

Because of expected frigid temperatures in Detroit, which includes night temperatures in the 20s with a chance of snow, the Tigers moved all three 6:40 p.m. games against the Yankees to the afternoon. Monday’s will start at 3:10 p.m. with Tuesday and Wednesday’s game scheduled to start at 1:10. “I think it makes a ton of sense,” Boone said. “Definitely on board with that.” Of the cold, Boone before Sunday’s game said, “We’re more of a summer game, but it’s part of the game, too, especially in April in the Northeast, the Midwest. You’ve got to deal with the elements some. It’s the same for both clubs. It’s a little more challenging, but one you’ve got to be ready for and hopefully we’re equipped for.”