BOSTON -- A glance at Fenway Park’s manual scoreboard showed only two errors charged to the visitors, an overly generous gesture by the official scorer. As Aaron Judge’s timeline for return remains murky, there have been several games where the Yankees’ bats have come up short. This one was on the gloves.

Domingo Germán was pounded for a season-high seven runs in one of the shortest starts (two-plus innings) of his big league career and the Bombers put forth one of their sloppiest defensive displays of the year, absorbing a 15-5 trouncing by the Red Sox on Friday evening.

“We have to play better,” said second baseman Gleyber Torres. “Some days, it happens. We have to try to shut down those little things and play like professionals.”

Masataka Yoshida and Justin Turner each drove in a pair of runs off Germán, who permitted seven hits, including knocks to all three men he faced in the third inning.

Turner cracked a grand slam later in that frame to spoil left-hander Matt Krook’s Major League debut, an inning extended when third baseman Josh Donaldson fumbled the transfer on Pablo Reyes’ infield single and first baseman Anthony Rizzo ranged too far to his right on an Alex Verdugo single; Krook blamed himself for not breaking to cover first base.

“It wasn’t the brand of baseball that we’re used to playing,” Donaldson said. “A little sloppy defensively -- or a lot sloppy defensively today. It’s not in our DNA to do that.”

The Yanks allowed a season-high 17 hits and tied their season high in runs allowed (also April 30 at Texas). It was an inauspicious beginning to the Yankees’ first Beantown visit of the season, especially after they dropped two of three to the Red Sox last weekend in New York.

But Boston hasn’t been the only issue; the Yanks have struggled against the American League East this season, owning an 11-13 record within their division and a 28-18 record outside of it.

“Through this stretch where it’s been tough for us over the last 10 days, we’ve played really well,” said manager Aaron Boone. “We just haven’t put a lot of points on the board. Tonight we were at least able to get some runs on the board, but overall, we just did not play a very clean game.”

Alongside ace Gerrit Cole, Germán has been one of the Yanks’ most reliable starters this season, posting a 2-0 record and a 2.84 ERA in three starts since returning from a suspension for utilizing foreign substances. But Germán didn’t have it from the get-go on Friday, permitting two doubles, a walk and a hit-by-pitch in a 32-pitch first inning.

“They were able to put the secondary pitches in play,” Germán said through an interpreter. “There were close ones in the zone that they were able to take, and the ones in their power zone, they were able to swing at those.”

Krook, a 28-year-old lefty, finally made his debut after 13 days collecting big league service, having watched from the bullpen for series against the Mariners, Red Sox, Mets and now Boston again. Krook momentarily appeared as though he might wriggle free from a third-inning jam, but ultimately permitted five runs in 1 2/3 innings.

“I’m super grateful for the opportunity,” Krook said. “I worked a long time to get here, so it means a lot. Yankees-Red Sox, Friday night, it was a lot of fun. I wish the outcome and results [were different].”

Tanner Houck held the Yanks to one run and four hits over four-plus innings, exiting after being struck in the face by a Kyle Higashioka line drive. The comebacker bloodied Houck, though he walked off under his own power, a towel pressed to his face. The Red Sox said that Houck had sustained a facial contusion.

Anthony Rizzo drove in three runs and Josh Donaldson hit his sixth homer in the defeat, which featured the second pitching appearance of the year by utilityman Isiah Kiner-Falefa, whose perfect 0.00 ERA was spoiled by Triston Casas’ RBI double in the eighth inning.

The Yanks have lost six of 10 games since Judge was sidelined with a right big toe sprain, an injury that required a second platelet-rich plasma injection during Thursday’s off-day. Though Judge is traveling with the club, there isn’t much he can do from the bench or clubhouse other than cheer -- and Friday’s performance certainly didn’t give their captain much to applaud.

“I know that we are coming in, preparing and doing things that we can do,” Donaldson said. “It has been a struggle to this point, but at the same time, we’re trying to stay positive and focus on the things we can control. That’s going up there, having good at-bats, trying to get on base and driving some runs in.”