Wheeler was diagnosed with thoracic outlet syndrome and will require additional surgery that’s expected to sideline him for six to eight months, the team announced Saturday.

Zack Wheeler, whose season is over after requiring major surgery for his injury, received a heartfelt message from the Phillies.

Phillies ace right-hander Zack Wheeler is out for the rest of the season, the team announced Saturday. Wheeler, 35, has been diagnosed with venous thoracic outlet syndrome (TOS), and the recommendation was to undergo thoracic outlet decompression surgery in the coming weeks. Such a procedure typically has a recovery time of six to eight months.