Harvey (back) suffered a setback in his recovery Tuesday and will be shut down from all activity for the next 2-to-3 days, Anne Rogers of MLB.com reports.
Harvey received a cortisone injection Tuesday to help his back recover, and manager Matt Quatraro estimates that the 29-year-old reliever will be back to playing catch before the end of the week. He had been looking to rejoin the Royals' bullpen before the end of the month, though his setback will likely push his return into September.