Wheeler was diagnosed with thoracic outlet syndrome and will require additional surgery that's expected to sideline him for six to eight months.

Zack Wheeler's season is over. The Phillies announced on Saturday afternoon that their ace was diagnosed with venous thoracic outlet syndrome (TOS) and will undergo thoracic outlet decompression surgery in the coming weeks.

But there was a consensus among the specialists. Wheeler was diagnosed with venous thoracic outlet syndrome and must undergo surgery to remove a rib. The Phillies estimate he’ll need six to eight months of recovery, which means his absence could seep into the 2026 season.