Brantley, on the disabled list since May 14, informed the team he felt soreness in the shoulder earlier in the week during his rehab assignment with Double-A Akron.
Diagnostic ultrasound on the biceps area showed scar tissue, for which a needle was used with local anesthetic to hopefully break it up. Dr. Jason Genin performed the hydrodissection.
"Trying to be cautiously optimistic about it," Quinlan said. "Early next week, get back to swinging and see how it feels."
Considering the scary alternatives, Indians manager Terry Francona embraced the results.
"The fear is when you get tested that extensively, you'll find something on almost anybody," Francona said. "The fact that they really didn't is great news. Now it's just going to be a matter of days before he starts again."
Starts what for when is the question.
"I know he's frustrated," Francona said. "This last little [stretch] has been hard to get through, but we're hopeful he'll be back and raring to go pretty soon."
Ben Standig is a contributor to MLB.com and covered the Indians on Friday. This story was not subject to the approval of Major League Baseball or its clubs.