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Phillies Ace Zack Wheeler Undergoes Thrombolysis Procedure After Blood Clot Diagnosis

Wheeler’s successful clot removal on Monday leaves his return timeline undecided

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PHILADELPHIA, PENNSYLVANIA - JUNE 9: Zack Wheeler #45 of the Philadelphia Phillies looks on against the Chicago Cubs at Citizens Bank Park on June 9, 2025 in Philadelphia, Pennsylvania. The Phillies defeated the Cubs 4-3 in extra innings. (Photo by Mitchell Leff/Getty Images)
inning during a baseball game against the Washington Nationals at Nationals Park on August 17, 2025 in Washington, DC. (Photo by Mitchell Layton/Getty Images)
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Overview

  • The Phillies placed Wheeler on the 15-day injured list after diagnosing a blood clot near his right shoulder over the weekend.
  • Monday’s catheter-based thrombolysis procedure removed the clot without establishing a recovery timetable.
  • Manager Rob Thomson said it “could be” that top prospect Andrew Painter joins the rotation to offset Wheeler’s absence.
  • Aaron Nola allowed six earned runs in 2⅓ innings during his return start, heightening concerns about staff reliability.
  • Philadelphia’s NL East lead now hinges on its remaining rotation depth and bullpen workload management.