MLB Star Removes One-Third of His Blood in Offseason Procedure
Philadelphia Phillies first baseman Bryce Harper surprised fans this week after revealing that he underwent an offseason treatment involving the removal and reinfusion of a significant portion of his blood. The 33-year-old MLB star shared the experience on Instagram, sparking widespread discussion about the growing interest in advanced wellness procedures among elite athletes.

A “Third of His Blood” Removed and Reinfused
Harper posted a photo of himself connected to medical equipment alongside the physician overseeing the therapy. According to his caption, the procedure he received is known as EBOO, short for Extracorporeal Blood Oxygenation and Ozonation. The treatment involves drawing approximately one-third of the patient’s blood, processing it through a filtration and ozonation system, and returning the treated blood back into circulation.
In his post, Harper described EBOO as a method of circulating blood outside the body to expose it to ozone (O₃) and high-grade filtration before reinfusion.
Why Athletes Are Turning to EBOO
Harper outlined several potential benefits that proponents of the therapy often highlight, including:
- Improved circulation
- Reduced inflammation
- Support for immune function
- Increased energy
- Toxin removal
- Enhanced infection-fighting capacity
While these claims have contributed to the therapy’s rise in visibility, especially within high-performance circles, EBOO remains controversial in the broader medical community due to limited clinical research.
Part of a Larger Trend in High-Performance Wellness
Harper’s decision reflects a growing movement among top athletes seeking advanced recovery and wellness methods to prolong their careers and maintain peak performance. Sharing the treatment publicly has pushed EBOO further into mainstream conversation, reinforcing how rapidly unconventional therapies are gaining traction in professional sports.
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