Lorenzen (shoulder) has been throwing bullpen sessions without issues, Rhett Bollinger of MLB.com reports.
Lorenzen has been out with a shoulder strain since early July, and his placement on the 60-day injured list last week means he'll be ineligible to return before early September. He doesn't appear to be advanced enough in his rehab to beat that timetable, but it's a positive that he's taking steps in the right direction.