Phillies Ace Zack Wheeler Undergoes Season-Ending Thoracic Outlet Surgery

Philadelphia Phillies ace Zack Wheeler has been diagnosed with venous thoracic outlet syndrome and will undergo thoracic outlet decompression surgery, effectively ending his 2025 season. The surgery, recommended after Wheeler sought multiple specialist opinions following a blood clot removal near his right shoulder, requires an estimated 6 to 8 months for recovery. Phillies officials, including President of Baseball Operations Dave Dombrowski and manager Rob Thomson, expressed disappointment but remain confident in the team's pitching depth and World Series prospects despite Wheeler's absence. Wheeler experienced symptoms of arm heaviness that led to further evaluation, and the surgery is considered less risky than typical thoracic outlet procedures, though it poses a significant challenge for the 35-year-old pitcher to return at an elite level. Post-surgery, Wheeler could begin throwing again in about eight weeks, but the full extent of his recovery remains uncertain. The Phillies continue to monitor his progress closely, emphasizing their optimism for his eventual return.