Phillies ace Zack Wheeler underwent a successful thrombolysis procedure to remove a blood clot in his right upper extremity on Monday morning at Thomas Jefferson University Hospital in Philadelphia. The procedure,

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 uncertain.

Dombrowski told reporters on Saturday evening that the Phillies are placing Wheeler on the 15-day IL with a blood clot in his right shoulder, which is his throwing arm. As ESPN's Jeff Passan reported, the timeline for Wheeler's return is "unclear."