Pomeranz (biceps) threw a bullpen session Monday and will make his third rehabilitation start Friday for Triple-A Pawtucket, Chris Cotillo of MassLive.com reports.
Pomeranz could be activated shortly after the All-Star break, although he hasn't pitched more than three innings in his previous two rehab starts. The left-hander may require a fourth rehab start next week to build up his innings and pitch count before rejoining Boston's rotation.