NEW YORK -- September reinforcements are on the horizon for the Yankees, and with rosters expanding for the postseason push, the club’s decision-makers will huddle late on Saturday to discuss adding a pitcher and a hitter. There are expected to be more than just those two moves in store.

After rookie right-hander Will Warren struggled to navigate four innings, Giancarlo Stanton came off the bench to deliver a big three-run double. But a ninth-inning rally fizzled as the Yankees fell to the Cardinals, 6-5, Saturday afternoon at Yankee Stadium.

“It’s definitely been a grind for us, but like I’ve said, it’s right there for the taking,” manager Aaron Boone said. “I’m excited for this final push, and hopefully, we’ll set ourselves up to get to play in October.”

Oswaldo Cabrera was rung up on a pitch clock violation for the first out of the ninth inning, as home-plate umpire Ben May determined Cabrera was not in the box and alert to pitcher Ryan Helsley by the eight-second mark on a 3-2 pitch. Though Cabrera initially protested, he acknowledged that he was in the wrong.

“It’s completely my fault,” Cabrera said. “I have to get better at that, because that happened [to Cabrera] twice this year. … It was a really bad situation to take my time.”

Juan Soto kept the game alive with a two-out double, but after the Cardinals intentionally walked Aaron Judge, Austin Wells waved at a Helsley slider to end the contest.

“I felt pretty good in the box,” Wells said. “He made a good pitch there on 3-2, with a low-percentage pitch for him. I was looking for a heater, but he made a good pitch.”

The Cardinals had been the only remaining Major League team not to register a victory at the current Yankee Stadium (2009-present). Their most recent win in the Bronx came in Game 5 of the 1964 World Series, when Bob Gibson hurled a 10-inning complete game.

Coincidentally, Saturday’s winning pitcher was another Gibson -- right-hander Kyle Gibson, who limited the Yanks to one run over seven sharp frames.

“Those guys are tough over there,” Gibson said. “It was a good one for me today; it was fun. I was able to execute, and we were on the same page all day.”

The Yankees concluded August with a 14-12 record, an underwhelming showing considering they played numerous teams at or below the .500 mark. Still, Boone said that the team is “in a great position” heading to September, owning the American League’s best record at 79-57. Much of that cushion was built early; New York is 39-38 since June 1.

“We’re sitting atop the division,” Boone said. “We have a chance to win a series tomorrow, though you can’t get too far ahead of yourself, either.”

In that effort, they figure to have some new faces at their disposal. Rated as the Yankees’ No. 5 prospect by MLB Pipeline, Warren has not looked ready for prime time through five spot starts, allowing 24 runs (23 earned) and 31 hits in 21 1/3 innings (9.55 ERA). Warren was optioned to Triple-A Scranton/Wilkes-Barre after the game.

Brendan Donovan lifted a three-run homer in the third inning, landing in the short right-field porch. Donovan’s drive would not have been a homer in any other MLB park.

“You’ve got to know where you can miss, in the zone and out of the zone,” Warren said. “These guys are good at what they do, [so you have to] minimize mistakes and minimize damage as much as possible.”

Saturday marked Warren’s final assignment for now, as right-hander Clarke Schmidt could be days away from rejoining the rotation after missing three months with a right lat strain. Boone said Schmidt is tentatively scheduled for a Minor League rehab start on Monday.

Another option is right-hander Cody Poteet, who has pitched to a 0.96 ERA through three rehab starts for Double-A Somerset, including a strong outing on Friday. Right-hander Luis Gil is also scheduled to make a Minor League rehab start on Sunday, and Boone has said he expects Gil to return as a starting pitcher.

Boone said that first baseman Anthony Rizzo is “likely” to be activated on Sunday. Rizzo has missed more than two months after sustaining a right forearm fracture in a June 16 game against the Red Sox. Though Ben Rice enjoyed early success, including a three-homer game on July 6, the rookie has batted just .176 overall (26-for-149). Rice was also optioned to Scranton/Wilkes-Barre after the game and is expected to be replaced by Rizzo on the roster.

Another consideration for promotion is outfielder Jasson Domínguez, the organization’s top prospect, who homered for Scranton/Wilkes-Barre on Saturday and is slashing .313/.370/.500 with nine homers and 28 RBIs in 51 Minor League games this season. Relief choices include right-handers Scott Effross and Lou Trivino, who are both at Triple-A.

“We’ll sit down now and see what we want to do for [Sunday],” Boone said. “We’ll go through everything and see how we want to go.”