Brantley has been diagnosed with a reoccurence of biceps tendinitis, Paul Hoynes of the Cleveland Plain Dealer reports.
The Tribe recently sent Brantley to New York for a follow-up exam after he reportedly hit a wall in his attempt to ramp up his rehab program. Brantley underwent a procedure last month to remove scar tissue from his surgically-repaired shoulder, and it's uncertain how long he'll remain shut down following this setback. At this point, it would be a surprise if Brantley made it back before rosters expand, if at all this season.