"We'll see what he has to say and go over some options," Atchison said. "The MRI definitely showed a tear; it's just a matter of how severe the tear is and what my options are."
There's a strong possibility the right-hander will need Tommy John surgery. Atchison, 36, was placed on the disabled list with right forearm tightness July 14 and suffered a setback during a recent minor league rehab outing.
"I figured there was some kind of tear at this point of my career, but obviously it's common for everybody to have something going on in there," he said. "Maybe that's why we didn't do an MRI the first time it happened because I was feeling better and afraid if you look at something maybe you'll see something and that's maybe not the cause of the problem.
"When it felt the way it did after I threw (for Pawtucket) the other day, I thought something else might be going on because it didn't feel the way it should."
Atchison is hoping this won't be a career-ending situation.
"I think even before the MRI happened, I was prepping for the fact (that) probably the news wouldn't be what I wanted to hear," he said. "As far as the surgery, if it's something I need, the best route and the only option, I'll do it. Hopefully, I'll get back and be the same guy I was before."
In 37 games with the Red Sox this season, Atchison has posted a 1.76 ERA in 46 innings, along with a 2-1 record.