Wheeler was diagnosed with venous thoracic outlet syndrome, and will undergo surgery after having a blood clot removed in his right arm. The expected recovery time is six to eight months.

Philadelphia Phillies ace Zack Wheeler’s season is over. The Phillies say Wheeler has been diagnosed with thoracic outlet syndrome and will require additional surgery that’s expected to sideline him for six to eight months.

The Philadelphia Phillies will not have their ace the rest of 2025. Right-hander Zack Wheeler will have surgery to treat venous thoracic outlet, the team announced Saturday. The surgery typically comes with a 6-8 month recovery, meaning Wheeler's availability for the start of 2026 could be impacted. He last appeared in a game on Aug. 15.