Manager Matt Quatraro said Sunday that Lorenzen (hamstring) is expected to make a rehab start Tuesday, Anne Rogers of MLB.com reports.
The Royals haven't specified which minor-league affiliate Lorenzen will report to for the rehab assignment. He's recovering from a Grade 2 left hamstring strain sustained in late August, so Lorenzen may need just one rehab outing to get back up to speed, though a clearer timeline for his return from the 15-day injured list will likely emerge once he's completed the start.