Coulombe (neck) will begin a rehab assignment at Double-A Portland on Friday, Chris Cotillo of MassLive.com reports.
Analysis:
Neck spasms sent Coulombe to the injured list toward the beginning of the month, and the Red Sox will now look to get the 36-year-old southpaw a tune-up outing in the minors before adding him back to their bullpen. He'll be eligible to return from the IL on Sunday.
