Orioles manager Craig Albernaz said that Gibson will be called up from Triple-A Norfolk to start Sunday's game against the Yankees in New York, Jacob Calvin Meyer of The Baltimore Sun reports.
The 23-year-old ranks as one of the top pitching prospects in Baltimore's system and has posted a 4.01 ERA and 1.65 WHIP through 24.2 innings (six starts) with Triple-A Norfolk this season. The Orioles don't have an opening in their rotation past Sunday and could get Trevor Rogers (illness) back from the injured list in mid-May, so Gibson will likely return to Triple-A after making his MLB debut.