Gonzales will undergo left flexor tendon surgery in early September and is expected to be sidelined for 9-to-12 months, Alex Stumpf of MLB.com reports.
Gonzales is getting his second forearm surgery in just over a year, as he had an operation last August for a nerve issue. The lefty was ready in time for Opening Day after last year's surgery, but the upcoming procedure will be more invasive, and he could be sidelined until around midseason. Gonzales, who turns 33 in February, will be a free agent this offseason after the Pirates decline his $15 million club option for 2025.