Phillies Ace Zack Wheeler Undergoes Surgery for Blood Clot

By Oliver Wiener August 23, 2025 18:19

Philadelphia Phillies ace Zack Wheeler will miss the remainder of the 2025 season after undergoing surgery to treat a blood clot near his right shoulder, a development that delivers a significant blow to the team’s World Series aspirations. Wheeler, 35, was diagnosed with venous thoracic outlet syndrome (VTOS), a rare condition involving compression of a vein that can cause blood clots, swelling, and pain in the arm. The Phillies announced that Wheeler will undergo thoracic outlet decompression surgery typically involving the removal of a rib to alleviate the vein compression and reduce future clot risk. Recovery from this procedure generally spans six to eight months, which could impact his availability for the start of the 2026 season.

Wheeler’s medical journey began earlier this month when he first reported symptoms of arm swelling and discomfort. On August 18, he underwent a successful thrombolysis procedure to remove the clot via catheter at Thomas Jefferson University Hospital in Philadelphia. Following additional evaluations and second opinions, the surgical recommendation was made to prevent recurrence and allow a safe return to pitching.

Before this setback, Wheeler was having yet another stellar campaign. In 24 starts this year, he held a 10-5 record sporting a remarkable 2.71 ERA and an MLB-leading 195 strikeouts over nearly 150 innings pitched. His WHIP of 0.94 affirmed his dominance in limiting baserunners while maintaining pinpoint command. Wheeler remains one of baseball’s premier pitchers, ranking seventh among all pitchers with a 4.0 Wins Above Replacement (WAR) for the 2025 season figures that underscore how pivotal he has been for Philadelphia’s rotation.

Reflecting on the diagnosis and upcoming surgery, Wheeler expressed both frustration and optimism. “It’s tough to hear any setback like this when you’re in the middle of a good season,” Wheeler said. “But I trust the process and the team around me. I’m going to do whatever it takes to come back stronger and help this team chase a championship next year.” His resolve has resonated widely, especially among Phillies fans who have seen him evolve into a workhorse ace since joining the franchise in 2020.

Manager Rob Thomson acknowledged the impact of the news but emphasized the Phillies’ organizational depth. “Losing Zack is a huge hit for us on the mound, no doubt. But we have great arms behind him, with Cristopher Sánchez, Aaron Nola, and Jesus Luzardo stepping up. We’re confident the rotation can carry this team down the stretch,” Thomson said. Sanchez alone leads the National League this year with a 4.7 WAR, providing a solid foundation in Wheeler’s absence.

Wheeler inked a lucrative three-year, $126 million extension prior to 2025, underscoring the Phillies’ commitment to him as the franchise cornerstone. Since signing, Wheeler leads all pitchers with 979 innings pitched and 28.7 WAR, which highlights his enduring excellence and durability despite earlier Tommy John surgery and other injuries.

While surgery marks an abrupt pause to Wheeler’s 2025 contributions, medical experts express cautious optimism regarding his long-term prognosis. With a proper rehab regime and careful management, many pitchers have returned to full strength after thoracic outlet decompression surgery, although the road is arduous.

For now, Wheeler’s priority will be focused on recovery and rehabilitation with an eye toward competing at an elite level in 2026. His journey epitomizes the physical toll of pitching at the highest level and the resilience required to overcome it. As the Phillies continue their pursuit of postseason glory this year, the hope remains strong that their ace will thrive once more on the mound in the not-too-distant future.