The lefty is awaiting a second opinion and said surgery could end his season and possibly his career.

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“Obviously (the discomfort is) very disappointing with all the stuff I did in the offseason to prevent something like this from happening. It’s frustrating,” Lee told reporters Monday, via MLB.com. “There’s still a possibility it’s scar tissue and it’s normal but there’s also the possibility (last year’s injury is) coming back and that’s very frustrating.”

The 36-year-old lefty has been the talk of trade rumors this spring, but given this new development, it’s unlikely any team would take on the former Cy Young winner considering surgery would likely end Lee’s season.

“So basically if I have the surgery this season will be done, possibly my career, I guess,” Lee said. “I don’t know. We’ll have to see.”