Naughton was diagnosed Saturday with UCL damage to his left elbow after undergoing an MRI, Jeff Jones of the Belleville News-Democrat reports.
The 29-year-old lefty suffered the elbow injury during his most recent appearance with Triple-A Memphis on Wednesday. Naughton will seek a second opinion before determining his next steps, but he could be facing another elbow surgery after missing most of 2024 and all of 2025 due to a pair of elbow procedures.