Akin was recalled from the Orioles' alternate training site Tuesday.
The 25-year-old southpaw logged a 4.73 ERA, 1.51 WHIP and 131 strikeouts in 112.1 innings at Triple-A last year but gave up three runs in three innings in his first and only MLB outing earlier this year. With Wade LeBlanc (elbow) done for the year, Akin could get some starts or work as a long reliever going forward.