Philadelphia Phillies right-hander Zack Wheeler will miss the rest of the 2025 Major League Baseball season after being diagnosed with venous thoracic outlet syndrome, the club said Saturday. Team physicians have recommended thoracic outlet decompression surgery. The procedure, which targets a compressed vein in Wheeler’s throwing arm, carries an estimated recovery timetable of six to eight months, putting the 35-year-old’s availability for the start of the 2026 campaign in doubt. Wheeler, a three-time All-Star, had previously undergone surgery on 18 August to remove a blood clot from his right shoulder. He reported continued discomfort and diminished velocity in subsequent outings, prompting further evaluation that led to the new diagnosis.