MOOSIC, Pa. — Domingo German is ready to close the Yankees’ opener chapter.

A day after Yankees manager Aaron Boone indicated the 26-year-old could return to the rotation next week, German (left hip flexor strain) used a slick breaking ball to retire the first six batters he faced Thursday in a rehab start for Triple-A Scranton/Wilkes-Barre.

German unraveled a bit in the third inning, giving up a pair of two-run home runs — four runs total through four innings. He was credited with a no-decision as SWB salvaged a 6-4 win in the first leg of a doubleheader against Buffalo.

“He probably wasn’t as sharp as he’s been throughout the course of this season, but I tell you what, it was pretty doggone sharp,” SWB manager Jay Bell said after his team lost the second half of the doubleheader, 1-0. “That breaking ball was working really well tonight.”

Though the righty’s velocity was down, German said through coach Julio Borbon, the team’s translator, he felt strong overall and is ready to return — as the Yankees have planned — Wednesday against the Mets.

Thursday’s plan called for German to reach the 60-pitch threshold, and he exited after striking out five and walking two while throwing 65 pitches.

Before landing on the injured list earlier this month, German had emerged as the Yanks’ de facto ace in place of Luis Severino (shoulder inflammation). He pitched to a 9-2 mark with a 3.86 ERA, but gave up 14 runs in his last three outings before the nagging injury eventually landed him on the injured list.

The Yankees have used Chad Green as an opener in German’s absence, and the club is 7-0 overall when using that strategy.

German was the latest Yankee to play at PNC Field, following Aaron Judge who drew a much larger crowd last week during his rehab stint after missing two months with an oblique strain.