Puk (shoulder) threw a 20-pitch bullpen session Saturday, Martin Gallegos of MLB.com reports.
Puk has been increasing his throwing distance since being placed on the injured list with a shoulder strain. He's scheduled to throw a 30-pitch bullpen Monday as well. While the southpaw still doesn't have a timetable to return, manager Bob Melvin was optimistic that he'd be able to come back at some point during the abbreviated 2020 season.