McDermott is likely to be called up from Triple-A Norfolk make his major-league debut Wednesday in Miami, Matt Weyrich of The Baltimore Sun reports.
McDermott was added to the taxi squad Tuesday, and the Orioles have since announced that Corbin Burnes will start Thursday, filling one of the two open spots in the rotation for the series in Miami. The Orioles still have an opening for Wednesday, and McDermott is fully expected to fill the void. The 25-year-old right-hander has posted a 3.96 ERA and 129:54 K:BB over 91 innings this season with Norfolk.