Phillies Ace Zack Wheeler Diagnosed with Thoracic Outlet Syndrome, Out for Season After Surgery

Philadelphia Phillies ace Zack Wheeler has been diagnosed with thoracic outlet syndrome and will undergo decompression surgery, effectively ending his 2025 season. The procedure, recommended after a follow-up evaluation for a recent blood clot removal, is expected to sideline him for six to eight months, potentially impacting his readiness for Opening Day 2026. Prior to this, the 35-year-old right-hander was performing at a Cy Young level with a 10-5 record, a 2.71 ERA, and leading the National League with 195 strikeouts, marking a significant blow to the Phillies' World Series aspirations.