The Orioles recalled Hiraldo from Triple-A Norfolk on Sunday.
The move corresponds with the Orioles placing right-hander Kyle Bradish (abdomen) on the 15-day injured list. Hiraldo has appeared in seven major-league games this season with a 5.87 ERA, 1.70 WHIP and 13:6 K:BB over 7.2 frames. He gives the Orioles some additional right-handed depth out of the bullpen.