Phillies ace Zack Wheeler's season is over due to venous thoracic outlet syndrome. He'll require surgery and a 6-8 month recovery period. This diagnosis came after a second opinion following a blood clot removal procedure. Wheeler's 2.71 ERA and 195 strikeouts this year made him a Cy Young contender. His injury severely impacts Philadelphia's World Series chances, as they currently lead their division.

Prepared by Emily Rhodes and reviewed by editorial team.