CINCINNATI — The Orioles are set to be without their closer once again. Right-hander Ryan Helsley was placed on the 15-day injured list with right elbow discomfort, marking his second injured list stint this season.

The Orioles recalled right-hander Anthony Nunez from Triple-A Norfolk to fill out their bullpen. Before Nunez was optioned in June, he was one of three Orioles relievers with more than one save this season, joining Helsley and right-hander Rico Garcia.

Baltimore also recalled infielder Jeremiah Jackson and designated catcher Chadwick Tromp for assignment. That alteration gives the Orioles more positional flexibility rather than carrying three catchers on the roster.

Nunez, a rookie, broke out earlier this season. He held a 2.35 ERA at the end of April. But over the next few weeks, Nunez saw his ERA elevate to 4.98. In Triple-A, Nunez allowed five earned runs in five outings.

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Helsley joined the Orioles this offseason, signing a two-year, $28 million with a player option for 2027. He leads the Orioles with eight saves.

Helsley missed almost two months with elbow inflammation earlier this season, but his MRIs from that bout showed no structural damage. On Wednesday, however, discomfort cropped up again. He had been warming to enter in the ninth inning of a win, but with a barking elbow, he couldn’t pitch.

“My level of concern with something like that is always high. It’s almost like you prepare for the worst and hope for the best,” manager Craig Albernaz said after Wednesday’s win.

Baltimore opted to recall Jackson a week after optioning him, as well. That could spell the end of Tromp’s time in the organization if the catcher is claimed off waivers.