Greinke will be used in bulk relief for the Royals in Sunday's game versus the Red Sox, Anne Rogers of MLB.com reports.
Taylor Clarke will serve as the opener for Kansas City and likely work an inning or two before giving way to Greinke, who will be pitching out of the bullpen for the second time this season. In his return from the injured list Aug. 22, Greinke tossed four scoreless frames behind opener Angel Zerpa before returning to a traditional starting role his last time out. He'll carry a 1-13 record and 5.28 ERA into action Sunday.