In need of an additional reliever after the bullpen accounted for 5 1/3 innings in Tuesday's 9-3 loss to the Cincinnati Reds, the Orioles called up left-hander Jayson Aquino from Triple-A Norfolk on Wednesday afternoon.
The club also optioned right-hander Tyler Wilson to Norfolk to make 25-man roster space.
Aquino was scheduled to start Thursday for the Tides, but will likely serve as a possible long-relief option available to follow right-hander Ubaldo Jimenez.
Aquino threw a quality start in his most recent outing for Norfolk, tossing six scoreless innings Friday.