Pelfrey (back) is scheduled to throw a bullpen session Friday, Evan Woodbery of MLive.com reports.
Analysis:
Pelfrey had an MRI Monday which revealed a mild lower back strain but he said he was feeling better Tuesday and will toe the hill Friday to begin his rehab program. Since the injury is considered minor, the 32-year-old could return to the majors without a rehab assignment. When he does rejoin the Tigers he'll look to remain in the win column as he's 2-0 with a 3.52 ERA over his last three starts.
