Oviedo (elbow) will throw a bullpen session next week, Chris Cotillo of MassLive.com reports.
Oviedo has been shelved since April 3 due to a right flexor strain and remains on the 60-day injured list. He's likely still several weeks away from returning to the mound for Boston, although his rehab could be accelerated if he's ticketed for a bullpen role rather than the rotation.