Lakins was recalled from Triple-A Norfolk on Friday.
The 26-year-old delivered 1.1 scoreless frames while serving as the 27th man during a doubleheader last weekend, and he'll rejoin the Orioles after spending the past few days in the minors. Lakins has a 6.75 ERA, 1.56 WHIP and 14:12 K:BB across 16 major-league innings this season.