Puk (elbow) will begin a rehab assignment Tuesday with Double-A Pensacola, Jordan McPherson of the Miami Herald reports.
Puk could reclaim a majority share of the Marlins' closer role by the weekend, assuming all goes well on the farm. He had posted a sharp 3.07 ERA and 19:3 K:BB through 14.2 innings this season with Miami before landing on the injured list May 14 due to left elbow nerve irritation.