BALTIMORE – There were more flashes of Will Warren’s promise Monday night, showing a potential to become a reliable figure in the Yankees’ rotation.

But he’s not there yet, a point the Baltimore Orioles hammered home at Camden Yards.

Though he had his moments, Warren ultimately paid for a pair of walks that set up Ryan O’Hearn’s three-run homer, lifting the struggling O’s to a 4-3 win before 22,775 fans – with the usual healthy mix of Yankee rooters here.

Baltimore starter Tomo Sugano kept the first-place Yanks (18-11) off balance across five shutout innings, and the last-place O’s (11-17) held on as closer Felix Bautista made quick work of the Yankees in the ninth.

Bautista’s save included a strikeout of .405-hitting Aaron Judge, with two singles and an RBI Monday.

Will Warren’s “up and down” start to 2025

Following an encouraging five-inning start at Cleveland, Warren lasted just 3.1 innings against the underperforming O’s.

Monday’s lesson came in the third, when Warren walked Gunnar Henderson and Adley Rutschman to open the inning.

And when he hung a 2-2 slider to O’Hearn, it was 4-0, Baltimore.

“Just trying to make competitive pitches,’’ said Warren, regretting the walks. “At the end of the day, I’ve got to force them to put the ball in play.’’

Warren rebounded by striking out the side, finishing with five 5Ks.

His generally good mix of fastballs, sliders and changeups allowed him to escape a second-and-third, none out spot in the first – ending with strikeouts of O’Hearn and Ryan Mountcastle.

But just like Monday’s game, Warren’s opening month has “been up and down,’’ with manager Aaron Boone adding that “hopefully he continues to grow’’ from moments like the third inning.

“Overall, it’s about attacking in the zone,’’ said Warren, now 1-1 with a 5.63 ERA in six starts.

Yankees, Orioles give and take at Camden Yards

Back in the leadoff spot, Trent Grisham had two more hits – raising his batting average to .306.

But the Gold Glove center fielder made a jagged route on Ramon Laureano’s second inning drive, and it sailed over his head for an RBI double.

Grisham said he “had a good read’’ on the drive, but the ball cut on him during his pursuit.

In the fifth, Orioles center fielder Cedric Mullins perfectly timed his lead at the wall and robbed Paul Goldschmidt of a two-run homer to end the inning.

That was the last pitch thrown Monday by the 35-year-old Sugano, who has emerged as the ace of a woeful and injury-marred Baltimore staff.

Entering Monday, the O’s owned the league’s worst ERA at 5.37. Minus Sugano’s contribution, that ERA is 5.71.

Devin Williams returns on the road, in a setup role

Devin Williams was warming up in a 4-1 game, but suddenly entered in the eighth inning with the Yanks trailing by a run.

That’s because Anthony Volpe (on his 24th birthday) and Austin Wells delivered consecutive RBI doubles off lefty Gregory Soto, who rebounded to strike out Jasson Dominguez and get Oswaldo Cabrera on a groundout – both swinging from their weaker right side.

“Good to see him get out there and have a 1-2-3,” Boone said of Williams’ inning, which included a strikeout of Ryan Mountcastle on Williams’ signature ‘Airbender’ changeup.

And there was more conviction to Williams’ fastball deliveries, a pitch that had been pounded to a .462 batting average entering Monday night.

That gave the Yankees a chance in the ninth with the top of the order up, but Bautista got Grisham to pop out, struck out Judge on a 1-2 splitter (the pitch that was so effective for Sugano) and fanned Cody Bellinger on a 3-2 sinker.

Bellinger was 1-for-4 with a walk, but he’s batting .194 to start his Yankee career – inviting Ben Rice (rested from Monday’s lineup) – to see more time as the No. 3 hitter behind Judge.