"You always want to avoid surgery, if you can," Beckett told MLB.com Wednesday. "We're going to try a lot of different things in the next four weeks and then re-assess things. If it works, great. That's the best-case scenario. The worst-case scenario, there's been guys that have come back from this surgery in three months."

If Beckett has surgery, it would likely be for thoracic outlet syndrome, a procedure Chris Carpenter of the Cardinals and Matt Harrison of the Rangers have undergone. Beckett has already spoken with Carpenter, and plans to reach out to Harrison.

If Beckett is still dealing with the issue after four weeks of treatment, he might opt for the surgery.

"I think at some point, we just have to make a decision on what's best for me and what's best for the organization moving forward," Beckett said. "I think that those two things go together. What's best for the organization is being healthy and helping this team win next year if I can't do it this year."

Beckett will rest rehab for the next four weeks, but if he is still experiencing numbness in his throwing arm, a surgical option is possible. That would likely end his season, but a decision will not be made until then. 

"Any time something like that happens to your arm or you start losing feeling and stuff … you think about it for sure," Beckett told the Los Angeles Times. "I don't really want to think like that right now. I want to think about figuring out a way to deal with this."

Beckett has been dealing with the numbness for the last four or five weeks, and it got worse as he ramped up his rehabilitation from the injury. Beckett will have the results of an MRI reviewed Monday to determine the physical cause of the numbness.