PHILADELPHIA — Phillies ace Zack Wheeler had surgery Monday to remove a blood clot in his upper right arm, and the team says a timeline for his recovery remains unknown. Manager Rob Thomson acknowledged the uncertainty, saying, "We don't know" when asked whether Wheeler would pitch again this season or if the situation was career-threatening. The Phillies said Wheeler underwent a thrombolysis procedure by Dr. Paul DiMuzio at Thomas Jefferson University Hospital.

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