Happ is scheduled to pitch the first game of Saturday's doubleheader. He has won each of his four starts since being traded to the Yankees, compiling a 2.22 ERA and holding opponents to a .179 average over that span.
Yacabonis will be recalled from Triple-A to start the first game of the doubleheader. It will be his fourth start of the season and third as the Orioles' 26th man. He allowed three runs on six hits in five innings against the Yankees on July 9.